I would have to say for me the biggest concerns for bitcoin would be..
1. The Darkweb gets shutdown or takes another hit. IMO the Darkweb/illegal activity plays a huge role in the success and failure of bitcoin.
2. Banks getting involved. If Banks are losing out on money or think bitcoin is taking money out of their pocket they could create a mess for bitcoin.
3. The richest of the rich will own most bitcoins. The rich usually make money from the middle/lower class, if they own most they will be no profits for them and bitcoin become obsolete.
Just a few of my concerns and obviously just my opinion. If you have any concerns or comments I'd like to hear your input.
1. Alphabay shuts down. Yes. But other darknet markets are open/soon to open. Also, the darkweb marketes has a good impact on the success of bitcoin, but bitcoin can survive with or without the darkweb.
2. The government can spread FUD to the people, scaring them away from bitcoin, but they can't shutdown bitcoin. For them to achieve that, they need to shut down the internet. Which we know is very unlikely.
3. True. How come if the rich own many bitcoins there will be no profit for middle/lower class? Whoever has more investments, the prices are the same for both parties. But ofcourse the rich are gonna get more profit, since they have more money for investing. Whats the problem with that? Also, bitcoin is made as a currency or for storage value. Bitcoin is
NOT made to make profits. We're just making profits because of the volatility, but that's not the reason bitcoin is made.
The biggest concern with Bitcoin is currently ease-of-adoption and learning curve.
It takes years to really understand Bitcoin, at least for the average person.
Even learning how to buy it in the first place can be extremely hard.
That's the main reason we have easy-to-use services like Coinbase. It's for the less tech-savvy crowd. Also, maybe yea, it will take years to understand bitcoin. The thing is, you don't need to understand bitcoin to use it. Let me ask you, do you understand the world wide web? All those protocols and stuff? If you didn't take a computer science/information technology related course, then chances are, you don't. But you can still use the world wide web right? Exactly.