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STEEM is in my opinion.

First of all it's not a pump and dump scheme. Although there were doubts by some in the beginning, time has shown that the developers are in it for the Long haul.

It has real world us that is growing. STEEM/Steem is proving itself to be an ecosystem of use cases that will through survival of the fittest improve the quality of the platform and as a result the value of the coin.

The onboarding system which has been a limitation is improving over time. As users grow the success of the platform will grow exponentially.

No fees. Said another way: NO FEES!

It's fast. Said another way: IT''S FAST!

In regards to credentials, it's easy compared to most other cryptos. With wallet names that can be remembered it is easier to send coins and login and as compared to other coins.

I've invested and both earned and lost money in other cyptos. Steem for me has real world practicality that for me is the measure of the likely hood of it's success.

STEEM is the best altcoin for me. A coin that can be transferred within 3 seconds and confirmed with zero fees. Who doesn't like that. You can transfer your coin to other people and have no fear about price changes.

Why about passive income. Powering up your STEEM to steempower can earn you some passive income. You can delegate to certain innovatives on the platform which will earn you some cool bucks in return. You may also engage in curation where returns are paid in Steempower.

There is also possibility of leasing out the SP to interested individuals for a certain period of time and you will be paid a certain fee agreed by both parties.

You can see that holding STEEM has it's gain aside the normal increase in steem price. You can earn more than 40% of your STEEM back if utilized well.

For me STEEM is the best altcoin out there.

To me its Steem. It has number of advantages over other alt coin.

First of all it has no transaction fee.

If the price is not increasing, one can still make profit out of it through Steem Power.

You can power up and earn income.

You have also option to delegate your Steem power and earn from it.

At the price of Steem is on the lower side, so one can take benefit of it. 

It has lot of potential and even after HF20 more people will jump into it and price may increase.