The blockchain is public. If the hacker(s) try that, it would be know and the funds will tracked as they move across coins and accounts . They could use a mixe

The blockchain is public. If the hacker(s) try that, it would be know and the funds will tracked as they move across coins and accounts . They could use a mixer to launder the funds but that may make it even harder to cash out because exchanges will lock your account if u deposit from an address that's remotely related to a mixer output address.