If your product does not interest a lot of people, the patent is going to be useless, cause nobody will want to steal your idea.
If your product does interest a lot of people, some people may want to steal it, but:
- would you sue a Chinese company for selling copies of your stuff on AliExpress? How would you even sue that company?
- would you sue a major tech firm, while it's likely that anything that you built is likely infringeing on at least one of their patents?
- in the case you want sue, what are the odds of winning? Your patent may be void for a variety of reasons, and a copying product may not be considered as infringeing, if it has enough difference with the patented invention. What time frame are you looking at? 5 years, 10 years? Do you want to spend 10 years in litigations? What legal costs are you facing? Probably in the tens of thousands.
My advice to you as a failed startup founder myself, is to cool your head down, and stop imagining that what you invented is the next telephone, and pitch pitch pitch. If you pitch a room with 100 people, you'll be lucky if 2 guys come up to you at the end telling you your stuff is a good idea.
The patent is keeping you in a fantasy world, and that's not good.