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I do believe there is a real chance this might be the case, i think at the very leas half of that 8 trilion might go into cryptos, but on the other hand, gold wil always hold vale, it has done so for 1000's of years, gold could be used as a medium of exchange for small purchases or transactions as its easy to sell gold, there will always be a jeweller or money exchange willing to buy gold from you in person.