Yes it's always adviced to invest what you can afford to loose because nothing is certain, in the crypto market anything can happen, invest what you can afford to loose is a simple saying telling us to manage risk in crypto, don't be more concerned of the profit because you can also loose as well. Lately I came to find out that investing with all you got can make you be so emotional after investing or while trading because you did trade like your life depends in the trade and this could actually lead to failure.
Many people do not understand how crypto works, so some are very brave to risk everything to invest in crypto. Even though investing in assets that
have very high risks such as cryptocurrencies, we should invest what we can afford to loose. That way if the market moves not according to
our expectations, we will not panic and can be more patient waiting for our target to be achieved. My advice is not to be too obsessed with big profits,
so that using capital that is beyond our capabilities, this will only make us stressed. And the impact is very big if it comes to a loss, we will lose
everything and such a situation will be difficult to recover.