I think hodling most of your portfolio in about 3/4 coins is a good way to see 3x/4x quickly, you just need to pick decent projects,
Currently I am hodling
WTC
XRB
PRL
ENG
SHIFT
I will be moving into ETH and XMR as they will pump soon I believe
I recommend these coins, will see nice returns I think. Choice is yours though, its your money at the end of the day.
Among altcoins, Ethereum, Monero, ripple, Litecoin, waves and neo stay at the top of the list. I think one must include if not all then some of these in his investment options. These are the ones that can be trusted blindly besides bitcoin and your belief is a correct one. ETH and XMR will be soaring up soon. You can count on XPR too. I suggest investing in them as soon as possible.