Is it always a good sign when investors invest or show interest in a product? Asking this because I got shortlisted for an interview in a fellowship program. (They invest in my startup if I get selected, they shortlisted around 20 applicants)
VCs are usually wrong. Angels are probably wrong even more. However, nobody at all showing interest might not be a great sign, either. Secondly and perhaps more importantly: don't confuse accelerator/incubator programs with investors per-se. The former group tend to be very focused on a specific period such as feasibility or pre-seed and in a poor case are actually consciously making their money out of systemically reselling the x% of the companies they bought in to for tea-and-biscuits at a higher valuation with high frequency and rapid turnaround. They can be very clearly misaligned with adding long-term value, and just want to push for a fast flip. That's why some will pressure for MVP/POC, stupid timeframes and in-person presentations even when it makes little sense technically or commercially for the venture itself to do so. It can be real rabbit/hat smoke-and-mirrors stuff. That's private equity in general.