medyo malaki difference ng dalawa. BTC is suuuuper secure kasi simple lang yung infrastructure niya. and siya ang grandfather ng lahat ng crypto, when it moves, the entire market moves with it. ETH naman is a bit more complicated but it's super useful because of its endless utility.
personally mas gusto ko mag hold ng both, pero with the upcoming transition of ETH from proof of work to proof of stake baka may malaki siyang upwards price action potentially bigger than btc. NOT FINANCIAL ADVICE