Due to some research I noticed that these are some of the favorites, each one because they have their differentiated potential:
Ethereum
considered the second most popular crypto-currency
Ripple
Banks such as Santander have joined the platform
Iota
uses an even lighter system, the tangle network, that there are no transaction fees.
Raiblocks
all have been distributed, so that their value tends to grow considerably, has been seen as a way to raise money.