I have been thinking the same - Lol. In fact, big whales can play this game with little-medium coins which are very depressed in their price. In the case of one good coin with a total capitalization of just 500K USD I was thinking that I'd be quite close to be able do the same and establish a floor that couldn't possibly be broken. In the case of Byteball, currently you would still need too much money to impose a floor with 100% certainty - some tens of millions of USD which would be able to buy up to the total suplly if all dumped at current prices. But people with a lot of money can actually really plan to impose a floor to some coins they believe in, an operation which realistically would need just a fraction of the total capitalization of that coin, since anyway buyers and sellers are quite balanced all the time.