A few habits remove most of the practical risk.
Test the exit before it matters. Deposit a small amount, play a little, and withdraw. You learn the real processing time, the minimum, and whether a verification prompt appears, while the balance at stake is trivial. Compare the result against /instant-withdrawal-casinos.
Keep the funding wallet. Use a wallet you control for the life of the account, and withdraw to the same address on the same chain. If a check ever comes, being able to sign a message from the depositing wallet is the strongest evidence you can offer.
Withdraw often. Sweep winnings out rather than letting a balance accumulate. Every pound sitting in a no-KYC account is a pound whose release depends on a clause you do not control.
Read three words in the terms. Search the document for "verification", "source of funds" and "dormant". Those three passages tell you what the operator can ask for, when, and what happens to an untouched balance. Also check the withdrawal limit per day or week: a low cap turns a large win into an instalment plan.
Check the bonus maths. Offers in this segment often carry a verification trigger at the point of release as well as a wagering requirement. Never act on a headline figure without finding the wagering requirement attached to it, and if the requirement is not published anywhere, treat that absence as the answer. /tools/bonus-calculator shows what a given multiplier costs in turnover.
Last, the framing that applies to every site here. Gambling is a purchase of entertainment, and the house edge is its price. Even at the favourable end of this market, the price is real: Stake Originals run at 99% RTP, which is a 1% edge, BGaming Crash is also 99%, and Spribe Plinko is 97%. Paid over thousands of spins, 1% is not nothing. /tools/rtp-simulator shows the shape of it, and /methodology explains how these listings are put together.