of course crypto's have changed lives. Here's a fun story about a Norwegian that bought bitcoins years back and forgot about them until 2015 and he could easily buy a house from it.
https://www.theguardian.com/technology/2015/dec/09/bitcoin-forgotten-currency-norway-oslo-home
But there are no safe bets in crypto's. You could easily invest your savings and lose them all but it could also change and be doubled.
Never invest more in coins than you can afford to lose is the advice everywhere.
If you really DO want a suggestion then I'd believe that Ethereum would be your safest bet.
RE: A VERY CURIOUS QUESTION!