The highly-rated 22-year-old striker bagged a brace in Saturday's 3-0 League One home win over Exeter to take his tally for the season to seven in all competitions.
"The lad just loves scoring, and if he keeps scoring like that I'm sure it will only be so long before someone comes in and takes him off us," said Stimson.
"I think the crowd have picked up on what I said last year, and are now appreciating him. You've got to think about what a pleasure he is to work with and to watch as a fan.
"He was disappointed with a few of his teammates at the end because they wouldn't set him up for his hat-trick. I love that from a player, it's a really good sign he cares that much."
On the game itself, Stimson added: "We could have had five. We kept creating chances and played off the front foot right from the start."