Well if we talk about Kraken exchange I think we can talk about the longest cryptocurrency exchange to date with its creation in 2011, a solid trajectory, and at least I have never had any problem there, it is true that you need to pass a KYC to operate there, but it is really worth it, it also has a staking program for all members who do not belong to the United States and has a security as enviable exchange, in addition is now passing a regulation In the state of Wyoming to be regulated as a bank.