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Why not steem? 3 second blocks. No transaction fees....

From a technical point yes, from a investor's point I think many are put off by steem's inflation. People like low max supply.

There are a few contenders. First one is obviously Ethereum, once it migrates to Casper. Another interesting competitor can be any member of the graphene family: Bitshares, Steem, Eos. And let's not forget about Monero, one of the most stable cryptocurrencies out there.

Time will tell.

Thank you for giving me some insight. I thought you were going to keep your cards close to your chest :) I see you left litecoin and BCH of this list. Is it because of their similarity to bitcoin?

Litecoin was always just a lab / testing playground for Bitcoin and used almost exclusively for that. BCH is way, way too young to emit any opinion, even an (un)educated guess.