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Go with something that I thought works well with most people.
What do you use? Why not you write one too for the record?

another thing. the professor who was teaching me and said try to get some ETH was using coinbase.

I use Quoine. When it comes to choosing an exchange, I consider 2 things in the order of : Reliability, and fee. I don't see Coinbase being far too superior over others in the reliability while the fee is just too high.

Quoine has zero trading fee just so u know. You may want to try
at https://accounts.quoinex.com/sign-up?affiliate=4o4a1Wgk33226

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