In my opinion, buying only bitcoin at this moment is a little risky because there is a possibility of a dump at any time. At the moment where the market trend is fluctuating so your investment should be synchronized with the market situation. But i don't recommend investing too much but bnb if you want. Can buy exciting altcoins like eth, arb, doge, poolx. Moreover if a bullish market develops this year rest assured that most of them altcoins will give good returns. As my list of favorites is different so follow some more posts.