Paypal

I have had a paypal account since its inception and it is linked to ebay. I have an online store and a minimum of 50k goes through my PP account every year. NEVER had an issue with paypal or ebay. Only one instance where there was a dispute and they held funds for like 2 days.
I have bought a staggering amount of items from ebay over the years. I have heard many horror stories about paypal and ebay but my personal experience with both have been A+.
I used to carry 5-10k balance in paypal but now I keep it down under 1k just in case something happened. Hackers suck, its the luck of the draw if you get hit. The only thing you can really do is change your password often and use long random passwords.