If you have $100 right now than just invest that in some promising ICO which is currently open for investment. You might get more than 10x return within a year if that project got successful. Look at Monaco for example, price has skyrocketed after few months of their launch.

Yes I have gone through similar dilemma and regrets before but I used to forget them saying that it was just another unlucky day for me. Stop thinking/regreting about things which you can't change now.