The best advice to follow is to see bitcoin as a long term investment vehicle. Ignore all outside noise, FUD & short term price movements. You will not lose money if you buy bitcoin & hold it long term. For any noob, just starting to buy now, it might be hard for you to become rich by buying only bitcoin in the short term but if you buy bitcoin regularly over many years you will be in a good position.
Save bitcoin alongside regular monthly fiat or pension contributions. 20 years of DCA (dollar-cost-averaging) monthly into bitcoin will put you in a nice position to enjoy a comfortable retirement.
Bitcoin will always be profitable especially if you see it as a long term investment. Forget about bitcoin as as a get-rich-quick scheme as only poor minds fall for it, thats why they never end up successful investing in bitcoin because of that mindset. But if you keep doing DCA everytime there is an opportunity to buy, and you place them for long term hodling, thats when you start seeing sustainable profits and even put yourself in a very good position as long as you keep the faith by hodling your bitcoin, and you stay out of panic buying and selling.