Try to figure your usual monthly return, half the amount and offer that to your "investors".
Make the entry point low, like a $50 or $100 per "parts" and work like you're a crypto based mutual fund. Also try to make sure you're a little bit certified so its all legal.
Make sure your customers can withdraw their money anytime, and FAST. Don't ignore them, don't miss any emails, be very communicative.
There's no reason why you can't create a finance company, just make sure to comply with the laws and to be transparent and you'll be fine.
Actually I think you do, you have to give a document with your risk level, where you put the money, etc..
There is nothing wrong with your specialty being crypto, why hide it ?