I am trying to figure out what bitcoin or blockchains will be used for if a new coin has no blockchain (replaced with tangle), quantum resistant, with no scability problems and no fees. About future use of blockchain in finance and other domains, how far can Iota replace it ?
Bitcoin and many other cryptos aim to replace currencies and financial institutions in general. Iota aims, as the backbone of the IoT, to be the fast and necessary network of billions of devices. So it's not a competitor, it's a different field of application, so moves alongside. AFAIK there is no competition between IOTA and Bitcoin. But I guess core can tell you more about its scope.
Thanks