I could shame OP for falling for the crypto hype but I think the more important lesson here is to never ever mix family and finances.

Even if you know for 100% fact that you have a slam dunk investment, it’s not worth it. Money corrupts.

Never loan money, even if you don’t expect it to get paid back. It creates a power imbalance. Envy and resentment for you having money is better than creating any financial ties.

Never go into business with family.

Don’t mix finances and family. Family is more important than money.