Large jackpots are not a problem in fact, they are just a high RTP pool of the provider accumulating contributions. Problems start when the operator itself “emulates” a progressive jackpot without certification. I always ask: who is the fund’s provider? Where is the certification? Is there a limit on the maximum spin? On the forum, someone used katanaspin as a random example in an online casino jackpot discussion. The main advice is not to confuse the size of the reward and real security. I recommend playing only in trusted online casinos with official jackpot providers.