All cryptocurrencies must fit into 10% of the investment amount, the rest - stocks, bonds, gold, etc. In absolute terms, the minimum threshold for investing in crypto can be at least $10, but the method of purchase is important. If an investor buys not a real cryptocurrency, but a derivative instrument from a broker, there is no minimum. When it comes to buying ETH and BTC, I would recommend aiming for at least $200 so that fees don't hurt returns. In some cases, the minimum wallet fee is $10, plus the Ethereum network fee is another $15. so choose a reliable broker like bybit vs bitget and go ahead.