I am more concerned about sites I visit using my computer to mine the stuff. But the latest Opera 50 I'm using doesn't allow them.
An ad blocker like uBlock Origin will stop miners on other browsers too, I use it on Firefox https://themerkle.com/ublock-origin-developers-take-steps-to-block-cryptocurrency-mining-scripts/
Gonna get very interesting indeed when central banks, and the governments they own, make untraceable currencies illegal and everyone's investments become worth zero real money.
Trump has created a giant bubble in the stock market, I think I could have more trust in BTC right now than the market because it's so high it's doomed to crash 1929 all over again because we do not learn from our past mistakes Edit: We did learn from that and enacted laws to prevent but today those laws have been repealed
Even better trust in Gold than in BTC I'm pretty sure governments won't allow any type of money out of their hands.