Again, it depends. You must be having industries you are interested in, so you see main problems on them. Talking about me, I am fond of attending different events, so I often face problems, when buying tickets. Kinda entire process is different depending on provider, resellers are always having large prices and from time to time sell fake tickets. Thus, blockchain must help on the market. The solution I have discovered is GET protocol. Guys are bringing blockchain to ticketing industry, making it much more transparent. And they are already doing great results - from partnering with Klaitn and Oerrock festival to more things being done already