We saw what wanna cry Ransomware did to the crypto currency market it made it spike high bitcoin touched 3,000 USD - ether tocuhed 400 USD.
Today there is a new Ransomware it's called "Petya" it should create more demand on crypto currency market which will make prices rise higher but here is the tricky part it's not as big as wanna cry because the Petya ransomware can't really unlock the files unlike wanna cry ransomware they don't even provide email to send the unlock hash
so all the recommendations is that you don't pay the hackers.
this is very initial prediction we will see what will happen in the next days