Can companies, partnerships and HUFs invest in Coin?
Yes, companies, partnership firms, and HUFs can invest in Coin.
The account opening process for companies, partnerships, and HUFs can be found here
Note - they should mandatorily have a DEMAT account with Zerodha. Accounts opened before 15th September 2015, should close their IL&FS DEMAT and open a Zerodha DEMAT.