The blockchain is seriously overloaded right now, transactions are experiencing huge delays:
...
I believe this has also a bad impact on trading (i.e. too slow from and to exchanges).
You mean traders who
a) lose something like 0.2-0.3% for every trade (exchange commission)
b) accept big bank or SWIFT fees for every fiat transfer in and out
c) accept trading taxes / capital gain taxes etc by their government
...don't have a few cents to get first block priority tx?
Btw, the #1 problem in bitcoin trading is not the speed of btc but the extremely slow fiat / legacy banking.