How much minimum we can invest??
Thanks.
The OP said minimum of 0.1 ETH and maximum of 50 ETH. But seems the max has been reviewed. You can confirm yourself.
Also you have to know that there are many fake websites and channels of Arcblock out there. So be very careful and only check this ANN first page for official website and channels
What to be always up to date on the events of the coin, the project you are looking for specifically, to ArcBlock, I advise you to visit the official group of telegram
https://t.me/ArcBlocksubscribe the same way in the social network facebook
https://www.facebook.com/arcblock.io/ twitter
https://twitter.com/ArcBlock_io