Sorry about your loss but his knowledge he gave about cryptography and bitcoin you can hopefully help spread more good.

I use to hear about bitcoin thrown up on forums and just read comments about how great it is around 2011 but I didn't look into until my friend started buying some at around 12 bucks. But it wasn't for big investments or anything, so time went on and summer of 2013 a group of us friends decided it would be the right time to start mining but last minute we backed out and we seen the difficulty levels just start to rise and decided to just help other people get it by spreading ATM-like machines.