Luke Littler has been warned that money could have the biggest impact on his darting dominance.The back-to-back world champion has earned over £4.1million in prize money during less than three years on the PDC Tour.Littler has been told what his biggest downfall in darts could beGettyMeanwhile, he currently tops the PDC world rankings with £2,966,000 in earnings in the last two years.As a result, Littler could soon become the first player ever to surpass the £3million mark on the Order of Merit.Littler warningFormer BDO world champion Scott Mitchell believes the amount the teenager wants to keep earning could prove to be his downfall.Speaking on the All About The Darts podcast, Mitchell explained: “I think the biggest thing that’s going to impact on Littler’s dominance is how much money he wants.“How much money does he need to live, or how much money do you earn to keep your hunger to want to keep winning?“There has to be a motivation at some point or another. For the likes of myself, there was never enough money around for us to say.“Don’t get me wrong, I’m in a better position in life now than before in my darting career by a long shot.“But I’m not in a position to be going and buying Porsches and Ferraris where Luke is.“You don’t have to buy them when you get that good, they give them to you. But the fact of the matter is, I think, could he win 16 world titles?“I think he’s now saying: well, I’m two closer than I was two years ago. I’m on two and can I catch him.Mitchell believes the amount of money Littler wants to win will impact his dominanceGetty“Will he have the hunger? For Phil (Taylor), the money was never the issue, it was always the title, always the accolade that he liked.“If Luke can stay like that, I think he can stay in the game an awful long time.”Littler has already won 26 PDC titles, including 12 premier event victories.The latest of those came earlier this month as he successfully defended his UK Open title.However, he will have to wait for his 27th title after withdrawing from this week’s Players Championship events in Leicester.Littler will also skip the German Darts Grand Prix this weekend, having already won on the European Tour this year at last month’s Poland Darts Open.Littler has already scooped over £4.1million in PDC prize money after winning 26 titlesGettyThe 19-year-old will be in action on Thursday, though, for night nine of the Premier League in Manchester.It follows his third nightly win of the year in Berlin last week as he added to previous victories in Cardiff and Dublin to move top of the standings.