Bitcoin is definitely the choice and will be the advice you get the most because people here are mostly bitcoin maximalists. But if you post your question to the altcoin board, I think the answer will be a little different. Therefore, you should decide everything instead of listening to what others say. If you don't have enough knowledge to choose which coin is right for you, you should stop investing and don't invest just because someone else tells you to. Even if you buy bitcoin, you won't be able to keep it for long without knowledge.