There are price in the financial markets.
But I think holding it for 5–10 years will actually be profitable.
By putting aside some regular portion, just like fixed deposits used to be. It is a type of investment or opportunity to make a profit. "Buy low, sell high" is an asset that you hold for the long term, not something that you "buy when the market is up and sell when it's low".
Bitcoin as an investment is what has made it thrive so well today. When it is being used for other purposes, it doesn’t get that attention of the people to want to own some of them. But as an investable asset that have proven to be profitable is what makes many want to invest in it and own some amount of it with them. Holding for the long term has also proven to be the best way to be profitable after investing into this asset, so that makes it another store of value for the investors and keep the price sustainable for a very long time before a major move happens in the market is as in the case of bearish cycles, when whales sell to take profit after long term holding.