Yes, if you invest in Bitcoin and hold that investment for long term then surely you'll end up making profit from that investment, but before investing in Bitcoin you should learn about Bitcoin investment and personal wallet. You should also learn about cold and hot wallets so you may not face any issues with your investment.

I also suggest you to follow a good strategy for investing in Bitcoin. I personally follow DIP+DCA strategy where I invest a certain amount in Bitcoin when I see huge dips and then I keep doing that whenever there occurs a dip. That way I can accumulate more Bitcoin with the same amount of money.