I am not mixing it but when I received BTC, I just convert it into PayPal funds and withdraw the same to my bank account.
BTC value fluctuates a lot and a BTC worth $1 can become $0.05 in no time so it's no use in my POV to keep storing it for a long time.
PayPal and most bank-transfers can be reversed. Bitcoin can not be. Scammers like to exploit this difference for fraud purposes.
Oh, did not know that bank transfers can be reversed
Yes. PayPal does reverse the transaction but Bitcoins cannot reverse the transaction. Fraud people make the impossible also possible.
Yes, bank transfers, like all modern financial systems, have fraud protection built in and can be reversed. Bitcoin has no built in fraud protection. The burden is on the consumer to ensure they are not victims. If you're a seller it's great because no one can screw you by taking the product and doing a charge back. If you're a scammer it's also great for the same reason.
Butterfly Labs is a perfect example. BFL went to all of the Bitcoin conferences and did everything they could to convince people they were an honest seller. Well they weren't honest. The only people that got their money back were the people who paid with PayPal because they used the built in fraud protection. The people that paid with Bitcoin need the Federal Trade Commission to get their money back and that may not even work.