Swedish central bank governor Stefan Ingves compared buying and selling bitcoins to trading postage stamps. He questioned the currency’s viability without government support.

“Private funds usually collapse sooner or later,” Ingves said. “Of course, you can get rich on trading bitcoins, but that is the same as trading stamps.”

Bitcoin has garnered support from people like Tesla CEO Musk and investor Katie Wood of Ark Investment Management. However, some financiers have doubts about the future of cryptocurrency and compare it to the 17th century tulip bubble, when flower bulbs were sold at auctions and exchanges in Europe. According to European Central Bank Governing Board member, Gabriel Makhlouf, cryptocurrency investors must be prepared to “lose all their money.” Former US President Trump agrees with the bankers, who called investment in cryptocurrency “a potential disaster.”