You're 19 dude, you're early to life. As long as you learn how to Save, & Invest you'll be just fine. Avoid debt, focus on self-growth, and development, growth takes time but the earlier you start the better. Focus on eating healthier, exercising, building an emergency savings fund, putting your money into assets that appreciate overtime, and not spending more than you earn, as long as you focus on consistency, you will improve. Also yes, buy Bitcoin.