Lite coin 
I know, it sounds like an unpopular opinion but I remember every time when BTC and cryptocurrency approached ATH or in their bull run, transactions stuck with a very high fee. Moving your asset from one exchange to another or depositing it from your wallet to your exchange wallet took a lot of time. Only Litecoin work and show it was reliable at that time and I really like it.
I know, it sounds like an unpopular opinion but I remember every time when BTC and cryptocurrency approached ATH or in their bull run, transactions stuck with a very high fee. Moving your asset from one exchange to another or depositing it from your wallet to your exchange wallet took a lot of time. Only Litecoin work and show it was reliable at that time and I really like it.