Nothing. I buy on dips and low prices. After a set period of time when the stock has made multiples of my investment, I sell some at high prices and recoup my initial investment. The remaining stock I hold is pure gravy - if it collapses I have lost nothing. I own a number of stocks that have done well, where I have recouped my investment. Some are speculative, but most are sure bets. Yes, it's a form of gambling but I do my homework. Some that don't climb quickly or are not interesting, I divest. I just sold Nissan stock last week, made a profit - their new Ariya is competition to the Tesla Model Y, and the stock is climbing slowly. You can either spend your money on a product that depreciates in value, or buy into a company and grow your money - your choice.
And you can gamble, to use your own phrase, on highly speculative instruments and win or lose big.
That’s fine, knock yourself out and good luck to you.
But that in no way, shape or form legitimizes the current price of either TSLA or Bitcoin. Your gambling profits or losses come despite that reality.