@Rudi *****************
If you had the money in crypto stables (USDT, USDC, DAI, etc) before selling/transferring to your bank account, maybe show transactions history of where the stables were held before to cover the 3-6 months time? Otherwise, if it was in BTC or alts and you sold them, I don't think that will convince them for the money requirement. But you can always try and/or ask them in advance.
For me they never replied to my email, but they were responsive on Messenger (even replied at like 10PM 🤔).
Good luck!