If you are going into long term hodling, I will advise you to make BTC your choice because it always bring huge amount of profits at the end but if you are going into short term hodling, I will advise you to make altcoins your choice because it will allow you to earn little profits from your hodling.
Ethereum is also good for long term mate but it is altcoin , this means one thing that we need to only trust what coin to put our investments and if its long term and short term.
Since the capital you are budgeting for the investment is not too big, you can invest it on BTC only since BTC still remain the king among other cryptocurrencies and it will help you to make double profits from your investment, if you can wait for the bull run to occur before you can sell.
this kind of question sometimes depending in the target and the belief of the investor because they can buy bitcoin for long term , or they can invest in altcoins those who are super cheap but has huge potential like AI projects.