You said when you start trading, you should always start with small amount, am not completely in support of that, if you are trading as a newbie you should always start with a small amount but as a professional I don't think you have to enter a trade with a small amount, but as a newbie you have to always start low.
thus the wisest decision is to start trading with small amounts because after all the crypto market is also very risky for beginners,
better focus on learning about everything related to crypto trading