Hashflare BTC contracts are 1 year term and when I got in it took less than a month for me to see bitcoin crash to $3k. Furthermore hashflare had open contracts, forever mining until unprofitable, that I bought in before they changed it to 1 year. So honestly do I profit, yes, but no where near any of the gains they advertise and this is assuming bitcoin prices remain elevated. My current ROI is about 120 days, a little less since bitcoin is over $10k. I am a little over half way there but my first hand experience of seeing a bitcoin price crash is leaving me anxious about the contract. Time is not on my side if bitcoin all of a sudden crashes again. That is why I want to get out more than getting in. Not trying to bash hashflare, but not really my ideal choice to invest.