I'm honestly not as well versed in what the latest alternative cryptocurrencies are as I used to be. However, I don't know of any that have solved the problem of blockchain bloat due to increased microtransactions.
I still think Bitcoin would be the best choice at the moment. It has a developer community that is actively working on solutions to the problems that keep it from being better suited to large numbers of microtransactions.
I still think Bitcoin would be the best choice at the moment. It has a developer community that is actively working on solutions to the problems that keep it from being better suited to large numbers of microtransactions.