BTC People see Bitcoin as an asset, like gold or stocks. This is very disappointing because in order for Bitcoin to become a global currency and for banks and governments to be excluded from its control, it should be used as money for transactions and buying and selling, not just as something to buy, hold, and sell when its price goes up. The current view of Bitcoin is far from Satoshi Nakamoto's original goal.
The initial idea of Bitcoin creator was for it to be a currency. It was created to be an alternative to fiat but due to the gain that the validity of the Bitcoin market brought, people decided to be holding it instead of using it as a currency.
Apart from the above reason, it is also known that bitcoin transaction fee is not stable and goes very high when there is congestion in the mempool. This is one of the reasons why Bitcoin refused to develop in becoming a currency instead of an investment asset