[nlperguiy]

None of these technologies are dominant enough. Not a single one is a usable product.

All cannot support a large number of transactions, not even those that do not have proof of work. There's research-level problems being solved (like bulletproofs for compact private transaction - hides amounts). After research is done there's engineering. Then testing until it is ready to use.

People really don't realize how early this is.

Lightning network, a proposed solution for Bitcoin scaling problem, was announced 2 years ago, and they identified many issues with it since then. There's talks of layer number 3 etc.

This is way too early and there's no winner. Bunch of cryptocurrencies are riding on the research-wave behind Bitcoin.