I am Ukranian, so I vote for waves.
Also I lose all money that I earn on Neo when it was overhyped.(

In the developed world, population is aging rapidly, so there is an increased demand for healthcare services. A great part of the expenses, is administrative costs. Solve.care platform will improve care, by dramatically reducing administrative costs.  This can be achieved by facilitating, low cost peer to peer transactions, to avoid unacceptable administrative burden. In early 2018, the platform signed a multi year agreement with Arizona Care Network.  Four components are linked together for the network, to provide it's services. The Care wallet,  houses, Care Cards and Care Tokens. The Care Cards are applications downloaded, and the Care Token, is an intelligent programmable token to pay healthcare providers. The fourth component, is the Care protocol, that synchronizes all the above.

Great video, I think. But it didn't work cause author closed it,... mdeee

The only business that I know in crypto currency word is that that servs to cryptocurrency, such as mining, echanges, wallets and bots.

This is an interesting question, generally depends on many factors. Now, of course, I earn little, since this coronovirus shakes the exchange very much. And in general, it worked out well for me and I used these toolsbest crypto bot and telegram chanels.