To answer the other part of your question about the futur, it is complicated to tell.
Bitcoin will stay like this for a few years for sure as you need electric power to have mining power. It is the same for Ethereum at the moment, but Ethereum planned since the beginning to evolve to a Proof of Stake where block validation won't be won with hashing power but with the Ether that you hold. I don't know if you are familiar with those principles but the main goals behind a switch to Proof of Stake is environmental reasons (no more electricity waste fight) and safety (someone who hold Ether have a good reason to be honest and validate correctly on the network than someone who doesn't have Ether).
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Thanks, that is helpful.