Crypto Newbie / Simulators / Bonding Curve
Bonding Curve Launchpad Simulator — Pump.fun Mechanics
Pump.fun and copy-paste bonding-curve launchpads dominate Solana memecoin culture. The mechanic: anyone can launch a token, the curve mints + prices automatically, and once $69k (~85 SOL) in real liquidity is collected the curve 'graduates' to Raydium AMM. This simulator runs the same virtual-reserves math and ranks each buyer's P&L — so you can see for yourself why early buyers win and late buyers lose.
Curve state
Spot price (SOL/token)
2.80e-8 SOL
Implied market cap
27.9590 SOL
SOL collected
0 SOL
Tokens sold
0
Single buy
Run sequential buyers
How the virtual-reserves bonding curve works
Pump.fun uses a constant-product AMM (x · y = k) with VIRTUAL reserves: 30 virtual SOL + 1.073B virtual tokens at launch. Real buyers add SOL to the pool, and the formula computes how many tokens to release. Because the virtual reserves are large, price moves smoothly at first — but as more SOL accumulates, every subsequent buyer pays more per token. Spot price = vSOL / vTokens, which climbs as buys happen.
Why early buyers profit so much
At launch the spot price is ~30 / 1.073B ≈ $0.00003 per token. By the time the curve graduates (~85 SOL collected), spot has risen to ~$0.00007+. That's a 2-3× nominal — but because token quantity per SOL decreases, early buyers' position GROWS in token count too. Run the simulator with 10 buyers at 1 SOL each: buyer #1 typically ends with ~3× more tokens AND a higher exit value than buyer #10. The math is mechanical, not opinion.
The graduation cliff — what actually happens at $69k market cap
When the curve hits the threshold, Pump.fun automatically deposits the collected liquidity (~80% to Raydium LP, 20% retained as creator fees and burn). At this moment, two things change: (1) bonding curve trading stops, all subsequent buys must go through Raydium's open AMM; (2) the price is now whatever the open market sets it to. Typically there's a brief pump (~2× from celebration buyers) then a sustained dump as bonding-curve early buyers cash out. ~98% of graduated tokens are below their graduation price within 24h.
Why launchpad math is structurally bad for retail
Bonding curves work because someone has to be the exit liquidity. The team, the first 10 buyers, and bots all want to sell into demand. Retail buyers arriving via Twitter shilling after graduation are exit liquidity by definition — the curve has already done its job of distributing the cheap-price tokens to early actors. Buying a token AFTER the bonding curve graduated to AMM is mathematically buying the most expensive paper. The honest math says: skip launchpad tokens unless you're literally in the first 5 minutes.
Frequently asked questions
+What's the difference between a bonding curve and a normal AMM?
AMM: liquidity is added by LPs who hold both tokens already; price reflects market demand. Bonding curve: no pre-existing liquidity, the curve PROGRAMMATICALLY mints tokens as buyers arrive; price follows a mathematical formula not market sentiment. Bonding curves are launchpads — they end (graduate) once enough liquidity exists for a normal AMM to take over.
+Can I sell back to the bonding curve?
Yes — until graduation. Selling pushes the curve back down the same formula. But because the formula is symmetric, you receive less SOL than you put in (especially after fees). Selling is mainly a bot/MEV game; retail traders rarely time bonding-curve exits well.
+Are launchpad tokens always scams?
Not literally scams (no theft of funds outside the protocol). But ~98% of Pump.fun tokens trade below graduation price within days. The structural problem isn't fraud, it's adverse selection: the best projects don't need a launchpad. Launchpads attract teams whose tokens couldn't get funded through normal means, so the average launchpad token is below-average quality before you even consider tokenomics.
+Why does the simulator show market cap higher than SOL collected?
Market cap = spot price × total supply (1B). But only ~10-15% of tokens are sold during the bonding curve phase (~120-180M out of 1B circulating). Spot price extrapolates as if ALL 1B existed at that price — which they don't, the rest are locked or reserved. So 'implied market cap' is a marketing number; real liquidity is much lower.
+How are graduated launchpad tokens different from CEX listings?
CEX-listed tokens went through KYC/legal review, have liquidity from market makers, and trade on regulated infrastructure. Graduated bonding-curve tokens went through zero review, have minimal liquidity (often $50-200k LP after graduation), and trade on permissionless Raydium. The slippage difference on a $5k buy can be 10× between a CEX-listed mid-cap and a graduated launchpad token. Match your size to the venue.