Volatility is a factor of Bitcoin functionalities, jus like an inherent trait that Bitcoin works with, for investment purpose, since Bitcoin is best performed when viewed on a long term perspective, maximizing every price point to buy more of Bitcoin is the best, with DCA strategy of accumulating Bitcoin, one can buy Bitcoin irrespective of the price point either weekly or monthly and by so doing, you average out your losses by buying at different price point, yeah you are very correct that every transactions should be made with all alacrity and carefulness in order not to loss your coin out of carelessness.
You can find volatility in all markets, big or small volatility only.
Volatility is key for traders and investors to get profit from their trading or investment. Without volatility, we will have a stable market that can be considered as dead market that won't benefit anyone.
The big difference between Bitcoin and altcoins or traditional assets like stocks is with Bitcoin, you will not have things like depeg or bankruptcy. You might have risk to lose money with altcoins and depegs, bank stocks, bank savings and bankrun, bankruptcy. If you choose Bitcoin to store your money in it, you will be safe. It's not 100% safe because there is always risk so is Bitcoin, but it's safer in my opinion, while you can have good chance to get very good profit.