For now, maybe. But I think all it needs is for the idea to catch on, and then for supporters' clubs/trusts to actually start raising money to gradually buy a stake in their clubs.
It doesn't have to be all at once - start with an aim of raising enough money to buy, say, a 2.5% stake in your club, confirm with the club that it will sell such a stake if offered a price, solicit funds from fans via membership fees to raise that cost, and then acquire a stake. Build from there.
If 100,000 fans offered £500 each, that would be enough for a 5% stake in a club worth a billion pounds - might even buy half of a club like Huddersfield, or a quarter of a club like Watford.
Yes, it's impossible for Prem fans to outright buy an entire club at the moment - the prices are too high. But if gradual stakes were bought and built up, maybe, come the next football crash, that could change.