I personally have invested in mining BTC, and am expanding into other coins. While not in my home, as the electricity does not scale to what I wanted to achieve. I was (my machines were) in China... they are shut off... I got lucky with a friend and found an available space in the US, very reasonable, that had 60K of electricity provision installed... (@ 0.06 a KWH) which can supply over 150 machines... all on a boat headed home. And I have wrapped a completely independant business around this.
As far as Delfi... take a look at Nexo.io. If you hold 10% of your holding in Nexo coin, they pay 6% interest on BTC (and a number of other coin) and 10% on stable coin like USDT AND on Fiat currency (USD, EURO & GBP) (daily... so daily compound) . They are a great place to HODL ... if you have your 10% Nexo token, finance is like 5.8% of our credit amount, no min paydown. Oh... and Nexo Token went from 0.53 in like Feb to $1.75 today... not a comet out of the sky... but a good return on my 10% purchase.
In terms of comments about how innovative this is, or is not... does it really matter ? Personally, I take a percentage of my profits from my mining operation to reinvest in additional rental properties... no... it is not a new way to fly to the moon... but it is a way that ANYONE can easily generate additional income to grow an investment portfolio... in the case of most here, a real estate portfolio. And as my mining operation grows, and my real estate holdings grow, I gain financial independence that will allow me to quite my day job, which previous, has been the source of growing my real estate portfolio... just now I can do it faster... AND I think that is a goal for most here.
Where is the bad in that !?!? why so much negative ? Offer some constructive criticism if you see a flaw with an approach, that is part of why I come to the posts... but, if you just want to be demeaning... join that other social media site that the rest of the world is on who want to just spew hate. Sorry if that is offensive... but geez !!!