Why Stop Loss is Important ?

So Far i seen many Traders on youtube or Forex traders ( i know crypto is different but both have stop losses )
almost all Professional Traders set Stop loss because they Don't stuck there money for weeks or days and they know they can recover that loss rather than just stuck that money forever in that coin ( forever = longtime )
and yes i do sell sometime in small loss when i think it worth it :)

You need to learn it first and set some stop loss otherwise you will have to face 10 to 50% down if you had stop loss on 10% it would be only 10% and you could buy low again and recover that 10% and some profit too ;)

Hope you get what i mean

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