After you have clearly explained Bitcoin to them and the decision to invest must be left to them, don't force them to invest because they might blame us when they make mistakes in the investment they make, but if we explain it well and the decision to invest is theirs, of course we can't be blamed for explaining it to them well and most importantly, there is no profit that we can get easily, of course there is a process that must be gone through to be able to make a profit from investing in Bitcoin.
Even though you have provided good basic information about bitcoin, encourage them to do independent research or their own information about bitcoin before they invest, of course this will help them understand much better, by you encouraging them of course they will synchronize the information you provide is correct or not. And also remind them that investment is a personal responsibility, not the responsibility of the information provider, that way we won't be blamed in the future. And also remind them that bitcoin will provide long-term benefits.