Yes, privacy projects will be here to stay and nobody can stop them. However, they will never go mainstream. It's up to you and your investment goals and whether you are happy with the profitability of a project that can't go mainstream.
I fully agree. The potential for privacy coin will always be there because there will always a big demand for the, but we should not expect them to be as popular as the top cryptocurrencies we have not unless there will be some compromises along the way. DeepOnion has a good chance to be very valuable months from now, in my own opinion though predictions in cryptocurrency can be so hard.