I went with a 75% BTC and 25% ETH for the time being. Of course neither one of them is doing very well at the moment. To answer an earlier post, I've been into BTC for several years. I first bought a bit at $800 and added a little more around $3000 and continued up to about $12000, so I've made a bit of profit so far. But BTC has slowed down while others have been galloping ahead, so thought it might be time to diversify.
Hi, I would consider at least one other project that you are interested and understand sufficiently well. Go with 10% or so, doesn't have to be too big of a deal unless you want to take the risk. Privacy coins can be a good choice (Monero) as well.