The Baggies are currently flying high in third place in the Premier League after exceeding all expectations so far this term.
Saturday's win at Sunderland was their fourth victory on the trot to maintain their best start to a season since the 1953-54 campaign.
Long admits there is no reason why they cannot qualify for Europe if they continue their form for the rest of the season.
"It does cross your mind that could be us playing in Europe next year," admitted Long. "You can dream, everyone can dream. We can dream that because we have put ourselves in a good position.
"If we carry on like this who knows what is possible? We will get to that 40-point mark, which is our first objective, and take it from there.
"It is a new challenge for us trying to keep in touch with the high-fliers, but the longer this run goes on the harder it will get because teams will respect us that little bit more."