Experienced people will never buy Bitcoin when the price is rising, they tend to wait for the price to drop and then buy and store it for a certain time to take big profits later. Therefore, in investing in Bitcoin, never FUD and FOMO and must be able to manage emotions so as not to get caught in big losses.
I don't think you are right because experienced investors who understands the concept of bitcoin knows that Bitcoin is a long-term investment as such no one knows what the price will be the next minute thats why they utilize every opportunity to buy at all time, so price upsurge wouldn't be a hindrance for them not to buy Bitcoin anytime anyway because of their set goals and plan, talking about loss in bitcoin investment it seems you don't understand it, you can only lose your Bitcoin once you forget, misplace, when a third part get in contact with your seed phrase or when your wallet gets hacked and also when you involve yourself in gambling activities or trading but as for losing incuring loss in Bitcoin I think you are trying to say depreciate of your Bitcoin as a result of the decrease in price which will also appreciate once there is an upsurge in Bitcoin price, though seeing your investment depreciating is not an easy stuff to bear as an investor but long-term mindset and volatility should keep you on the lane that the price of Bitcoin is not permanent, it changes from time to time and that should be hope reassured.