Ripple is a scam, over half the coins are going to its owner. It disrespects the golden crypto rule of decentralization and it can create as many additional tokens as it wants, no fixed quantity in circulation. Tech like Iota and Nano is the future in my opinion. Most of old blockchain technology gives increased rewards to increasing computational power to its miners. Iota has no miners and no single super computer has any more influence over the network than even a toaster. Iota is Quantum proof, meaning on the dawn of quantum computing it will not be made irrelevant like Bitcoin and so many others which will be overwhelmed and gain the power to rewrite the chain by taking 51% or greater control of the approval process. Iota is also the first token in existence which gains speed with the more traffic it gets. Old blockchain can get bogged down where a single exchange takes days to finalize. To make a transaction in Iota your device must first confirm 2 others. The more people are transacting, the higher the transfer speed goes up. It solves a lot of crypto problems and also transmits data securely as well as money. Nano is like a lite version of Iota, it uses the lattice structure without miners but it's purely for monetary exchange, unlike Iota which is a monster for handling smart cities, smart contracts, data transfer, money transfer, etc.