My biggest Problem are 1: the community: to many number go up people who dont want to use or spend btc and Just hold it. It went the way from a currency to a speculative asset which i dont like. I for example use it whenever i can and replace the btc which i used for buying stuff. It is much better for the network, price and adoption.

2: lightning. It is still to complicated and unsafe, also to much castodial. And the biggest Problem is that you still need the transaction to open/close a channel which will be expensive in terms of fee. So everybody says transaction cost doesnt matter but in the future when the costs are 100 or 500 dollar, it is almost impossible for the average guy to open a channel. I hope we get that fixed. If i for example gain Tips over lightning i want to safe them onchqin without loosing big amount of it in fees