Out of the blockchain companies you can invest in, I think this is the most legitimate.
There is one Stock (RIOT) that used to be a biotech company until late September this year. Then they decided to invest in the Coinsquare exchange (NOT Coinbase). They purchased a 12% stake and the markets went wild for them. That is a company that I would not invest in.
BTL was created solely for blockchain tech development back in 2015. At a time that bitcoin and cryptos were not widely spoken about. So they did it because they saw the benefits of the chain back then.
Any tiny 'company' that just jumps on the trend bandwagon is scammy, IMO.