Is 1800$ the only amount you have? Investing in bitcoin is a good investment, but investing all of our money in it is not a good idea as the future is unpredictable, so never put all your eggs in one basket. No matter how bad the crisis is, cash is always needed in all cases, so I advise you to have a reasonable allocation to avoid difficulties in life. You should only invest 50% of it in bitcoin, and the rest you should save in cash for everyday expenses and emergencies.
One of the most important things, your country is still banning bitcoin, so be careful with your bitcoin investment if you don't want more trouble.
In fact, this is a very small amount so that you can count on a good profit, but everyone invests as much as they can and how much they can. And you are right, it would be good to leave some kind of reserve from this amount, for unforeseen expenses, or perhaps even for everyday expenses, if these are all available funds.
To get a good result, you should also think about increasing your investment, because if you invest 1k in bitcoin and it grows to 100k, investments will bring only a few thousand, this can hardly be called a good result. Otherwise, the market is now entering a phase where we see good growth and there is a positive, perhaps a bull market is already beginning.