Buy a bit of everything.
Remember that guy who turned $27 into $1 million.
That only works if you buy the coins when they are like fractions of a cent.
What guy? Lucky bugger!
I kinda do the same shotgun approach myself but when I take my profit (or get out before losing too much) I leave some in and hope I've tipped myself nicely sometime down the road.
I do keep most of my poke in BTC and the top 10 volume Alts though but there's no denying the upside of some beaten down coins. It's been a brutal couple years.
Do your own research. And don't forget to tip yourself!