Bankroll and volatility
Two games with the same house edge can feel nothing alike. One drains you in a slow trickle; the other takes half your balance in a minute and hands it back an hour later. The difference is volatility, and it is the number that decides how long your money lasts.
Expected loss is boring, and that is the point
Over many bets, what you lose is simply what you wagered times the house edge. It does not depend on the game's payout shape, your target, or your luck so far:
expected loss = total wagered × house edge
100 USDT bankroll, 1 USDT bets, 2% edge → about 2 USDT per 100 betsThat is the cost of the entertainment. Everything else — the streaks, the big hit, the empty balance — is variance, and variance is what you actually feel.
Volatility: the same edge, a different ride
Coin Flip pays 1.98× on a 50% shot. Plinko at 16 rows on High pays 0.2× on the common centre slot and 1,000× on a 1-in-65,536 edge. Both are priced to the same kind of expected return, but the spread of outcomes per bet is enormously wider on Plinko. Wider spread means a bankroll of a given size busts sooner far more often, and also, rarely, multiplies. You are choosing a distribution, not a value.
Three rules that actually work
Size bets to the session, not the balance you wish you had. One or two percent of what you are prepared to lose today per bet keeps a low-volatility session running for hundreds of rounds; on high-volatility settings, go smaller or accept a short session.
Decide the stop-loss before the first bet. Set it in deposit and loss limits so it is enforced by the platform rather than by willpower at 2 a.m.
Do not chase. Doubling after a loss (Martingale) does not change the expected loss; it concentrates it. A run of eight losses on a 50% game happens once every 256 sequences and wipes a 255-unit bankroll. The provably fair hash does not remember your last bet.
Reading a game's volatility before you play
Look at the maximum multiplier and the probability of the common outcome. A game whose common outcome pays close to 1× and whose top prize is under 10× is low volatility. A game whose common outcome pays under 0.5× and whose top prize is 1,000× or more is high volatility, whatever its RTP says. Every originals page on this site states its edge and formula; the Mines and Plinko articles show the full tables.
Questions
How much should I bet per round?
A common rule for entertainment play is 1–2% of the session bankroll per bet on low-volatility games, and less on high-volatility ones. The goal is a session that lasts, not a formula for profit: no bet size turns a negative edge positive.
Which game makes my bankroll last longest?
Low edge and low volatility together: Coin Flip (1%), Dice or Limbo at wide targets (2%), Blackjack with basic strategy. High-volatility settings on the same games lose the same on average but swing far more.
Is there a strategy that beats the house edge?
No. Martingale and other progressions only rearrange when the losses arrive; the expected return of each bet is fixed by the game. Provably fair games make this verifiable rather than a matter of trust.
What is a stop-loss and should I use one?
A fixed amount you are willing to lose in a session, decided before you start. Deposit limits and loss limits in your settings enforce it automatically.