Depends on what you mean by pro. If you're at the helm of a $100 million hedge fund and you return 30% you're a hero. If you're trading your own $50,000 account and you return only 30%, you would have been better off flipping burgers at Wendy's. In other words, the goodness of your return is relative to your capital. It's easier to make tripple digit, even quadrupple digit returns in a small-to-medium sized account, but nearly impossible to do for any length of time with big money. Happy New Year.
Do a search. This type of question, as ridiculous as it is, has been asked in one form or another before.
Another reason a 50k account may 'appear' to do better is the willingness (or stupidity) to lose most or all of it in the pursuit. No hedge fund is willing to risk even 50% of the funds , if that.