Some people always think bitcoin is expensive but it is not. For instance if 1 bitcoin is = $10,000 we will say it is too expensive and when we look at the price in next two years it can be double($20,000-$30,000) and we realize that bitcoin at $10,000 was very cheap and something very affordable. The future will always make us understand that bitcoin is not expensive, we only miss expensive opportunities that we won't be able to get back.
this is how stupid many people thinks about Bitcoin and cryptocurrencies .
today they will say its a scam and tomorrow after bull they will regret that saying and this is why many of those who knew bitcoin from early 20's blame themselves for not listening to Satoshi and to the bitcoin believer.
People are concerned about how much "ROI" they can get from investing in bitcoin compared to the alts. It's not about how cheap or expensive the price of bitcoin is.
Let's imagine when someone had 100 bucks to invest in bitcoin, and how long it needed for him to double his money: 1 year? 2 years? Don't forget that the bigger the market cap, the more difficult it is to increase. People thought bitcoin was too expensive, but this caused by they had limited money to spend, and If someone has $100k to invest, I think it is always worth it to invest in bitcoin.