Hi folks, I am new to cryptos and this forum, please don't crucify me.

I had a few questions if you could please give me some insight.
With so many altcoins and high volatility/uncertainty, do you keep your coins in the exchange you bought them just in case you need to sell them quickly and for convenience?
I am using Binance at the moment (graduated from Coinbase/Gdax).
If you store in your PC wallet or any other type and you need to sell quickly, you can lose a lot of money if there is any glitch or delay when transferring back to the exchange, so I was wondering about this.
Also, how do yo know who to trust when you see someone talking favorably about a particular coin?
It looks to me that everyone and their mother are pumping to then dump without telling anyone so they can maximize profits, so can you even trust those groups I have read you guys follow?
Any suggestions for a reliable group to follow?
Thanks a lot.
I keep as little as 10-20% of my portfolio on Binancle although I was about to loose my funds three times so far on other exchanges like E-BTC. Lucky me I never keep a lots of coins on an exchange. Don't trust any of these pump and dump groups. They are all scumbags. If you are following charts for a while you will learn yourself how to market behaves. Studying charts can help you to understand more when to invest or sell a currency. Following projects closely can help you to act quickly before the crowd does. For example Envion just had an announcement about listing their token on HitBTC after ICO finished this January. News like this can have a huge impact to its value. Patient is also crucial to build a portfolio in crypto-land.