I've been using HSBC for several years now, and neither I nor any of my friends have had our accounts blocked. In Hong Kong, many people in the crypto use HSBC. I've only ever heard of triggering anti-fraud measures by asking you to verify via video or giving you a check to withdraw your funds. Now all withdrawals are made in Hong Kong dollars to HSBC, and I haven't encountered any situations requiring explanation. My experience with HSBC in Hong Kong is quite friendly; I don't know about Singapore, the US, or other regions.