@jewelz613 That 8% is nowhere near enough of a return on the level of risk you'd be taking by trusting a family member with your money.
If they're telling you they have some super secret special crypto that's about to moon, it's either a scam or they're smoking the same shit they're selling and will be as much of a victim as you will be.
If they're raising money for a business, ask yourself why they need the money, why they can't get it from a conventional lender.
Also, just for shits and giggles, look up ponzi schemes... they tend to start with guaranteed returns.
Ask yourself how your relationship will change when this family member doesn't return your money and tells you that the market took a turn or some other story that results in your money going up in smoke.
Just stick it in an isa or if it's for a house as you say, a LISA. According to moneybox, including the bonus, I've had a 33% return on my deposits in my LISA since last year. If you're quick about it, you can get 2 tax years worth of deposits into ISA/LISA but you've only got about a week to do that. You could put all of the inheritance into tax free savings near enough immediately.