There's this myth that ideas are scarce, or hard to get, or valuable. In the real world that's not true. Ideas are very cheap, very plentiful, and very common.

Ideas are worth nothing. Execution is everything. Picking the -right- idea is a skill. Fruitlessly following some idea into financial oblivion is a weakness.

I would suggest all Ideas first pass a simple test;

A) who is the market for this product. Specifically. Tell me their names what the do, what pain they have (that this solves)

B) can these people afford this product? Sure lots of people want to orbit the earth, how many can afford it?

C) can you reach these people to tell them about your product for finite amounts of money?

D) do you have the resources to develop this, and take it to market?

E) understanding that there's a 90% chance this fails, and your resources will be lost, can you afford to fail?

99% of Ideas will fail one or many of the above tests. That's fine, let it go, you'll have another one tomorrow.

Trust me, copying is the least of your worries.