There are several things I want to criticize, it's not that I don't agree with bitcoin or crypto, but it still needs improvement so that cryptocurrency is ready for mass adoption throughout the world.
Easy and cost-free transactions:
I don't agree with you, Transactions of large amounts of money may make fees look cheap, but in transactions of small money, the fees become very expensive. Especially bitcoins
As a solution to hacking problems:
In my opinion there is a lot of bitcoin or alt theft. Maybe the theft is not by breaking into the bitcoin network, but there are lots of bad malware on the internet, lots of phishing sites that will expose your keys. If your wallet has been hacked then no one can help you, maybe it's better if your bank account is hacked because usually the bank will provide compensation for such problems. Education is needed before bitcoin is implemented en masse
Crypto banking benefits for poor countries:
I'm not sure about your statement, most countries whose citizens don't use banks will likely be more confused about using crypto. How they buy, exchange and secure wallets. It's much more complicated than a bank account
Importance of crypto in financial activities:
Those are just a few, what's more important is if there has been a breakthrough in payments using bitcoin at companies that sell basic necessities, because people buy them more often.
Do you think that within 2030 we will find crypto currency almost everywhere in the financial sector?
I honestly want bitcoin to be a legal alternative currency worldwide, but I don't think it will happen in 2030, maybe at least in 2050 it will probably happen.