Decred has ASICs and there is nothing they can realistically jump to.
With PoS it’s even more liquid as you can dump your tokens and buy them on a new network to stake their. Assuming the tokens are worth anything.
I don't know how decred works, but typically there are consensus level barriers to this to mitigate "nothing at stake" attacks. For example you may need to lock the tokens for weeks or months to use them as stake, and it may be impossible to trustlessly transfer ownership of locked tokens.