Buying bitcoin is always risk, you can make quick profit or quick loss.
so, you need to research and carefully invest in it.
Buying or investing in bitcoin is not that risky because you can still make profit without having a good research because if you buy bitcoin now and keep it for a long time then you can easily earn money and for long term investment, it doesn't need a good research because, research is good for short term and for people who wants long term doesn't need that and they just need guts to hold it for long and also patience.