Most negative experience, Bitconnect itself! thankfully I was new to crypto at the time and very cautious about putting up money I could not afford to loose. But word to the wise, stay far, far away from leding platforms!
Best Experience, was watching my small amounts of BTC grow enough that i was able to afford a decent computer for the first time in my life. Now happily sitting on a nice setup with tandem vega64's, so it mines really decent when im at work or sleeping