Any reason why you picked these altcoins in particular? My recommendation is:
- STRATIS: made to be easily adapted for big corporations, solid dev team and a exciting new update coming up this month --> breeze
- SIA: cloud storage for a low price (very nice idea), although I dont see the price going x10000 with the current marketcap.
- Golem: sell your cpu/gpu. Many big and small businesses could use this service, if it keeps being cheap to use the service :)
anyway, just my 2 cents here, Cheers
My method of choosing valuable coins is to look on there websites and what the community says. I most go with the hype. Till now I made profitable choices.