Many scams switched to cryptocurrencies, unfortunately.
This is because:
1. Blockchain transactions are not reversible (beside situation of ethereum hard fork couple of years ago, but this is an exemption)
2. So far there is, in general, no identification of the receiving party - you just type in wallet address (and with some other cryptos as well transaction ID). This is supposed to change thanks to FATF recommendations
3. If a scammer is changing wallet frequently (or using privacy mode of privacy coins), it is very problematic to track scammer.
And if someone is offering you easy money fast and without effort - it is too good to be true, and therefore you should avoid such company at all the cost.
Making it online is easy for them to scam people, other than that its more secure for them to do this online than do it in real world.
About the transaction they can use mixer so they cant be traced by sending funds.
Well, for scammers , faking online has made them instant rich, so they will find ways for them to have a quick bucks, so it will be up to us how are we going to get rid with their modus. Especially in hacking our accounts, let's be careful with it, scammers are everywhere they even make fake social media accounts so don't ever rely your exchange concerns to twitter or to the facebook account.