I asked about your country because of the cost of power.
Cost of Power is everything in physical mining.
Now about the 100% return and what is safe ... well i have a dancing school for 11 years.It felt safe... now in the covid crisis playing poker in an alley seems safer.
Me and my team well we cashed out 180% but we where lucky and the timing was perfect with the almost 100% UP to ethereum.
Still i can vouch for the service.
If you are interested send us a message in
https://www.facebook.com/CoinTree-103968798041491/