How difficult is it to guess the cards that players have when they bet high?

How difficult is it to guess the cards that players have when they bet high?

It depends on the type of player. Some players play just the hand in front of them and rarely bluff. If they bet big they always have it. Others play every hand and bet, bet, bet. This is why we should be paying attention to hands we aren't involved to to figure out which player fits where on that spectrum.

To guess the cards are useless, when they bet high only ask yourself risk it or not.

It's hard to tell on online poker if someone is high or not. It's possible they could be betting high...