Scarcity is one of the reasons why bitcoin keeps increasing because there are so many investors who are willing to buy bitcoin at any given price because of its scarcity, which triggers the price to increase.
This another good reason for us to keep our bitcoin accumulation ongoing so that we can have some good portion in our portfolio and hodli for long because in future only the rich might be able to afford it. You should know that any asset that's a store of value ends up aporeciating overtime, and a time will always come that the poor and average might not be able to accumulate more even though they can buy bitcoin in units.
some people are still feeling that Bitcoin is expensive at it current price, however that's not true the fact is that we as humans are always scared of taking the right steps, when Bitcoin was $30k some set of people still saw it as being very expensive and that made them to invest in shitcoins however in just few months and years Bitcoin has doubled in value and those shitcoins they invited there money to has remain stagnant some has even went below there initial price value.
Those that are into Long term Bitcoin investment won't have this thought that Bitcoin is too expensive, it is only those who are traders that always have such feelings because they feel if they buy at high price they will lose, if anyone feels Bitcoin is too expensive now and because of that he won't start accumulation let him or her get ready to regret because surely Bitcoin will double in it's price value because Bitcoin has not grown to half of it's limit.
And yeah it is true that Bitcoin is highly volatile in nature however it's volatility doesn't negatively affects your investment as a Long term hodler, the significant gap between its current price and its potential future value prevents Bitcoin's volatility from having a major impact over the long term hodlers, if you keep focusing on the current price of Bitcoin and think is too expensive then you will regret will the price double in future.
Accumulate little by little now that the opportunity is here because the future of Bitcoin is very bright.
Dude to be honest with you the price of Bitcoin now is really expensive even though it hasn't gotten to half of it's future value but currently now it is expensive and the people that sees it to be more and very expensive are people who don't understand the benefit of investing and holding, and some think they can't buy little by little because they don't have an idea. However, traders doesn't actually look at the price of Bitcoin or how expensive it is all they do is look at the market, carry out there analysis and suggest the possible result or the possible movement of the market. In as much as our income are not the same hence Bitcoin will continue to be expensive to some individual and not only to some individual but also to some investors.