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Just checked Gemini exchange. Still working (that is, got to my account OK, balance is correct), but I did not try to sell anything. 80k is my first sell point.
coinbase always crashes during a rip. even the bank person i chatted with about bitcoin a bunch of years ago knew that happens.. i figured her for a coiner for sure when i heard that lol.
gemini is usually ok.
I have to say.. Gemini has always been great. My best experiences and no disappointments with that company. There have been a couple occasions where I had to have funds very quick (almost emergency-level type of urgency). I requested a wire from my Gemini account to my linked bank and the funds were there before I physically arrived at my bank to send them on to the final destination.
Their trading platform is easy and straight forward.
They must be a bit bummed as they were the first to apply for a BTC ETF, but the "early bird" did not get the worm.