Experience is what you need.
Start small.. gradually grow your risked money in time with your skill.
Know when to hold them and when to fold them
There was times i planned on flipping a coin short term and missed my chance.
So i had to decide.. dump now for a loss or maybe break even ?
or ? ..wait ?
That is often going to be the key..
waiting !
But for how long ? (time is money)
Many times i simply kicked back and waited knowing the coin would go back up.
And i knew it would not be all that long before it happened either.
So many times i seen guys on chat bitching about the price going down and i'd just laugh to myself quietly knowing i will have my profit while the noobs panic dumped.
But on some occasions i had to take my loss.
For example with obscure nearly dead shitcoins you may only have 1 or 2 chances in a year to sell.
Miss it and your fucked.. and the more you wait the more of an eventual loss you will end up taking.
KNOW
WHEN TO TAKE A LOSS !
You just can't teach this stuff.
Beware FOMO and emotions..
Be cautious and patient and ease into it all.
I was lucky to have done trading the way i did.
Which was i invested nothing.
So my early learning experiences where i lost money cost me nothing and were easy to rebound from.
I started with 0 cents.
I started using an old Core 2 Duo CPU mining and an old Nvidia card mining..
Then i took that "dust" to exchanges and started flipping for profits.
I still have some notes of my portfolio from years ago saved.. from Cryptsy.
It took me forever just to get one Litecoin.
I am GLAD i did not walk in with a big wad of cash trading.
I walked in with dust.. and learned over time.
Not much to say really.
Patience & Experience is what you need.. and don't be trusting of anyone or anything.
PS:
Exchanges are -->
not <-- BANKS
Be careful storing money on them !