I hate those milestone ages.
Thankfully I'm about as far off my next one as I can be!
Key thing about retiring early is your savings to expenditure ratio - try to save more than you spend, easier said than done I know, but as long as you're diversifying you should be secure enough.
Since steem's stabilised I'm starting to view it as a little less risky, so I'm gradually transferring some of of my assets over. Only in small amounts: just bought another £100 Litecoin today, that'll end up as steem.
I've no real interest in other crypto although I've made the decision to only transfer 90% of my LTC over to steem, may as well keep 10% back in case I fancy a punt on something else.