Nobody comes into a new innovation fully convinced, they always give it a try and increase their conviction along the way, it's fine to have some elements of doubt at the beginning of your investment into Bitcoin, but as you learn more about Bitcoin and advance in your accumulation journey having the long-term mindset. Your conviction and appreciation of Bitcoin would improve considerably.
certainly, we have a list of individual that where too skeptical about bitcoin and when you critical look at them, most of them looked at bitcoin as a form of threat to them to there investment option. they will naturally look for any loophole to point at as the reason why they think bitcoin is not what investing into, those are just opinions that are based on hatred but when it all clears up, we have seen them coming back to become investors in bitcoin and owning quite an handful of bitcoin in their portfolio.
at the entry stage and even along the investment phase, anyone is allowed to have whatever opinion he chooses to have which will only affect him and make him loose out on a good buying opportunity. imagine that you have the resource to buy bitcoin and refused buying because of the negative conviction you have towards bitcoin, you hold on to that conviction and did not buy till bitcoin went up to thrice it current price and then you now have a change of mind and start investing at that price, who then is the loser? so it is obvious that your skeptical whatever only affects you more and you are the one that stands to miss out if you because of your unbelieve in the potential of bitcoin refused buying when you are opportune to do so.