True, I assume OP's sister is an adult. If OP's sister did not consult him, it's probably because she didn't want to hear his advice. “computer guy” != financia

True, I assume OP's sister is an adult. If OP's sister did not consult him, it's probably because she didn't want to hear his advice. “computer guy” != financial advisor. I would try to convince her to consult a financial advisor (I would even pay for it) and let her make her own decision after that.