It's an unrealistic question to answer at all. You haven't given us any input for that. How much money you have, how much you are willing to invest, for how long and how much you want to earn from it.
You also need to understand that you can make money on bitcoin not only from selling or buying the asset. For example you can be a miner (there is a detailed guide at
https://cryptodaily.se), but the entry threshold is very high now and it will take you a few years to turn a profit.
Also now you can provide liquidity and get interest from it, it's quite a popular way of earning now and quite profitable, but very risky!
You can also just stack your coins on exchanges like Binance and get interest from it, but much less than through liquidity pools.
There are a lot of opportunities to make money in cryptocurrency now, all you need is your desire!