The dip in PTC's price has created a great opportunity to buy into a long-term growth story.Cathie Wood's Ark Invest holds PTC (PTC 0.65%) as one of its top positions in The 3D Printing ETF (PRNT 0.58%), and for good reason. The industrial software company's solutions and growth catalysts embody the idea that artificial intelligence (AI) will significantly enhance the efficacy of software. The results of integrating AI into PTC's software are tangible, and the good news is that PTC's valuation is extremely ...