The amount the hackers will demand is expected to double from $300 to $600 on Monday.
http://www.cnbc.com/2017/05/15/wannacry-ransomware-hackers-have-only-made-50000-worth-of-bitcoin.html
42.000$ to be exact,at the time of publishing of this article:
https://www.thetimes.co.uk/article/bitcoin-accounts-are-under-surveillance-6lb3kglsz
backup your sensitive data like spreadshits,txt files,word documents,photos etc.
a 60$ USB 1 tb hard drive can save you a lot of headache and coins
For coins a hard wallet or a paper wallet is a must. Papers with random numbers are easy to hide around no one would search.
Hard drives can have hardware failures too, so even them are not totally safe, specially when there are physical solutions, like paper wallets