You should better stick to the market trend, like BTC dominance about 70% and other 30% I would be bet on ETH
Well, I would do 50% to BTC, 20% for ETH and for the rest 30% I would prefer to go for the top 20 altcoins. As per the current market trend, I don't think that BTC would provide a good amount of profit right now, although it would just secure 50% of your investment but will definitely provide you a great assured amount of profit in the future. Rest I believe BNB and the other top prominent alts are capable of providing you good earning in the short span only...