Lack of quality, reliable self defense ammunition is a big negative. Although the TT33's M57's, and CZ 52's are all fun on the range ( I have examples of all three) I don't think they compare with a modern self defense pistol. Nothing available for the 7.62X25 is easily compatible with CCW. I'm not sure that there is even a good quality concealable holster available.
I have thought that a shortened, cut down TT33 with a decent safety would make an interesting CCW weapon. Powerful round, and slim profile. But no such thing exists, and quality ammunition would still be a problem.
Cheapshooter's rules of gun ownership #1: NEVER SELL OR TRADE ANYTHING!