You are actually right on this, if you look at the historical price of Bitcoin over the years, it has practically gotten better with age, it has behaved like a fine 🍷 wine, so it's even more likely that the more you hold unto your Bitcoin investment, the more you make more money out of it, so to me, sometimes I feel sorry for those that sold now, even though they sold at a profit, because the actual price of Bitcoin is no where near it current price like in 5 years time from now, and I also believe that due to it limited supply, it's a certainty that at some point, it price will skyrocket to a figure that even we, it supporter never expected.
The market is filled with uncertainty that is to say it also has risk assessment though there is a lower risk when it comes to Bitcoin investment.
Bitcoin is considered digital gold for long-term investment. Other cryptocurrencies have limited global recognition but Bitcoin is the only coin with global acceptance. Bitcoin trading volume nearly half of all crypto markets. Due to this high liquidity it is definitely a less risky investment. Moreover, anyone can manipulate the market of various shitcoins, there is no such opportunity in the case of Bitcoin. Since Bitcoin is decentralized, it cannot be controlled by the government or anyone in power. An altcoin will be worthless if held long-term but a bitcoin will be a permanent asset or will be considered as the digital gold in the long-term.