I agree, really Bitcoin is just the gold standard of crypto in my opinion. I think it will be in place for a few more years at the very least but another crypto will ultimately replace it. Bitcoin is really just a proof of concept, now other companies will use that proof of concept and build on it addressing the issues that are currently in place. This is true with any business or new invention.
One key thing that I think is currently missing from the crypto space that Bitcoin may be able to fill is a set of standards. Currently the space reminds me of the old days when home computers first came out. Nothing was cross compatible and consumers were forced to buy specific brands based on what computer they bought. Later it was determined that setting standards to build and adhere to was for the benefit of both the consumer and the business. I think crpyto being built to standards would give consumers the ability to choose which crypto they want that could be used on multiple platforms would be a great thing.