So far it's hard to say that any of the tokens are a smart investment. Most haven't found any real reason for their token IMO. They created a token with next to no plan on how to make it have value.

If you look at investing in a token like a share of stock then the creator should be looking to create value for it's shareholders/token holders. Since most of these tokens are just running knock off front ends of steemit with zero added value to the user I'm not sure why they created the coin other then to reap the profits from dumping their own coins.

There are a few exceptions that have better front ends, but does that make their token have value or just add to core value of STEEM? Is just being a "tribe" with a better front end good enough reason to invest? This is something I think each person needs to decide.

A few have found ways to create sinks (burn their tokens to help reduce supply or other ways to create demand) like NEOXAG. They have multiple sinks and considering I'd say @neoxian is one of the more business minded people on steem it makes sense this token has a chance of long term success.

Back to all the other Tribes out there. I'm not saying buying or owning their tokens isn't a good move. Your question is about what is the best investment. I think that if you are part of a group that tries to expand by issuing a token it's a good thing to support them. IMO there are plenty of projects worth supporting and just maybe a few of them will figure out how to add value to their token holders. If this happens your support of a community you believe in could turn out profitable, if not at least you used a little of your money to help support something you believe in...think part of our income should always be dedicated to this.