Look at siacoin that i made so much profit on, it acts as a decentrallised cloud server on the blockchain, pays people to store other peoples encrypted data with fail safes. Inginious idea, but still sometihing like only 10 terabytes used, when $150m is invested (or at least the market cap). thats 5 x $50 2TB harddrives.
Thats because every altcoin have its price pegged to bitcoin.
I wouldn't say pegged so much as reactionary to bitcoins movements. But during the long bear market from 2013 -2016, most alts were decimated until bitcoin revived. but a few good alts emerged during the bear market, ETH, Monero ect.
I asked in the altcoin forum if someone was making money out of Storj, which have a proposal similar to Siacoin.
Nobody answered. These projects are dead. Im not saying the idea of renting your disk space is bad, though.