I would respectfully disagree here DR. The example you give is off because Google owns a canadian TM - binance on the other hand does not and binance.ca appears to be owned by someone other than Binance. Not worth registering however as apart from the TM owner who would ever want it but i don't...
When you say ok I am not sure whether you mean legally or morally but legally the answer would be yes, perhaps morally as well dependant upon your intention