Strats are the only tokens I have (and invest) at the moment.
Some say, that 'don't put all the eggs in the same basket', but in my opinion, there's simply no good alternatives in cryptomarket currently.

Bitcoin is slow, bloated, and scalability problem doesn't seem to be solved ever.
Ethereum is fragile and has similar scalability problems - and it's way overpriced - especially when no real business actually uses it for anything!
It seems to be just a launchpad for new ICO's (which will in turn cause ether blockchain to crash every now and then).

Most of the other altcoins simply have nothing special or new to offer.

Stratis is a major improvement for the whole cryptofield. It has actual reason to exist.

That's why I invest in it - long term.