What is better (cold storage or exchange) ? please Help

Hi ,
I want to buy bitcoin or etherium also i'm thinking of ripple

My question is how to ?

I heard i can buy it directly and store it on hardware
or i can buy it via and exchange plateform

What is the best way and profiteble way for trading ? daily and long term

Please give me détails

Thank you All

Youtube: Nano Ledger S

And your questions will be solved adequately regarding storage. Always better to store offline.

Profitable trading? Nobody has a secret formula. Do you research, buy what you feel confident in, and go for it.

waterworks said:

ing? Nobody has a secret formula. Do you research, buy what you feel confident in, and go for it.

Click to expand...

But how to do offline storage ? is my question.
I'm a noob so i never bought cryptos before . I only know basics and theory .
When i want to buy i find only exchange website to buy ethereum for exemple from other people. Is it possible to buy it directly to store it and trade it late ?
sites like coinbase don't accept my country, Morocco

Did you miss the two sentences in my post regarding offline storage? I'll repeat it.

Youtube: Ledger Nano S

I don't know about foreign exchanges as I only use US-based exchanges.