I would split your funds between btc and alts.
Maybe 2btc and 1 btc equivalent of whatever strikes your fancy (ethereum, zcash, etc).
Watch for new things as well (eos, tezos, etc.).
Not necessarily buy them, but be informed.
Good advice but the opener wants to forget about its coins and this is not possible with new projects, even if those are the ones that gives the biggest earnings, so it is better to invest in bitcoin and known altcoins so the risk of losing your money is as low as possible.