I am not expert but just say to them the true, that you are from another plan called "cryptos" and had come from the future to tell them it is not too late to invest in Steem and Bitcoins yet, and now you are going to spend quality time with your family in friends because in the future you did not had the chance or the time because you where too busy working because did not invested in the currency of crypto's in time, if that don't make them move, nothing will my friend.
As i side note, 2018 will be a fun year all around, enjoy your early retirement, you earned it, and don't get rusty by doing nothing all day long and watching how you pile of coins had grown over night ahaha.