What is the top 10 exchanges which all the investors trust it?
For me
https://www.coingecko.com/en/exchanges is providing the best list of the trusted exchange site with actual volume without the manipulation that created by the marketcap site itself. coingecko is better than CMC.
There was a trust score method that can determine the best exchange site. You can get it on the cryptorank.io too.
That is a really good list. @sandra2010, check it out, I believe you will find something safe that works for you on the site.
I would suggest you use any of the 1-20 or 1-100 exchanges. If you are an average trader and you can't afford going through kyc then use any of the exchanges that does not demand kyc from average traders.