Believing the hype about tons of altcoins, plus "trading" without having any clue what they're doing (no stop loss?!) are the two biggest "taxes" on newbies entering this space, and in investing in general. Penny stocks, Forex, they are minefields for the newcomer. Hopefully you will have learned your lesson and move accordingly.

If you have friends entering the space, share your experience. Each one, teach one.