I don't think you can fairly compare Bitcoin holding with an activity such as gambling, it is rather a off-context comparison.
On one hand, Bitcoin is very new, it was launched less than two decades ago, while gambling has been part of humanity since the beginning of civilization.
Also, your post implies that having Bitcoin or holding Bitcoin is close to gambling, when it is not true, depending whom you ask Bitcoin is either a currency, an asset or an investment, ect. While gambling will always be what it is, complete and explicit risk for the sake of profit, it goes beyond volatility.
Yes, Gambling with bitcoin is different, so I think it is unethical to have a comparison in this regard, because gambling offers easy profits and doesn't take much time in the process, even though the probability is only 10% to win, and in bitcoin you need time to be able to benefit from it.
And it's true that bitcoin hasn't been around for a long time, so few people like it, the adoption rate is still small, and gambling has been practiced a lot, even in remote villages.
Honestly it depends on the owner of the bitcoin itself, including like you have FIAT in your bank account, if you want to make a deposit into gambling, maybe you can say the same thing, closer to gambling, because as we know that bitcoin is a tool for transactions, and gambling platforms accept it, so I think it's the same thing and doesn't mean that bitcoin holders are closer to gambling.