How much crypto justifies buying an hardware wallet?

BEFORE everybody starts commenting “just get one and stfu”, i’m a teen with no job, who puts their spare launch money into crypto, and before the energy crisis used to mine with their gaming pc.

I really like ledger, so i’d like to buy one. The nano S would be 100% fine if not for the fact that i basically do every crypto trade on my iPhone, which really teases me to instead save for the nano X

again, i don’t have much in crypto but i really don’t want to loose the one I have, which as of writing this sits in coinbase and binance.

for reference, if i sold all my crypto right now i’d be able to buy a nano S, but it would stay empty for a while, because again i don’t have much cryptocurrency as of writing this

thank you for your help

EDIT: after reading a lot of your comments, i’ll start using some type of hot wallet, and one i get an amount of crypto which is x3-x4 the cost of the ledger i’ll buy it