I would be interested to know what you think is the biggest criticism of Bitcoin or where you see the biggest weakness?
I'm not a developer but it's always been said about scalability. Maybe, there will be a real solution for that someday but I agree to Jawhead that despite that disadvantage, Bitcoin is more secure than the other cryptos. And with those cryptos that will say that they've got solution to Bitcoin's problem, just wait for them to get clogged and they'll also experience the same problem.