What are the most promising cryptos to buy? How much % should you put into eth/btc and other cryptos?
The most promising crypto will always be Bitcoin but in spite of that, it is still not advisable to have all eggs in one basket which means diversification of investment and the best 3 cryptos to choose will be BTC, ETH, and BNB in 60,20 and 20 percent respectively. However, crypto investment is not for lazy people and I will advise you have knowledge about portfolio management to secure your profit and to prevent loss.
10K for investment into ETH or BTC isn't that much. It is at this scale that you can start to see the big gains. Yes, it is usually advised to spread an investment over multiple assets but that's usually for newbies and people that are not sure of how exchanges work but when it comes to BTC or ETH I don't think there's a need to be shy.