I agree with Prof. Ian. Presenting research ideas and papers at international conferences has an overarching aim of refining and improving one's envisioned idea. So why hide it? The holy book advises that isolation would make one loose important practical wisdom. If you fear your idea being stolen which I think any serious scholar wouldn't do, go for patent right. Best regards
Conferences are often considered to be a venue for preliminary results. A later journal article will need to be much longer than a conference paper, and you may use more data, answer more research questions, etc. Plus both the conference and the journal article can go on your CV. :-)
I agree with all of the previously shared advice. My point refers to the format of presentation in your selected conference. If your goal is to get detailed/in-depth feedback from delegates so that you can use it for your research (and publication) purposes, it's important that you present in a round-table session. This type of presentation typically attracts ONLY those delegates that are interested in your subject area (vs. those who come to a paper presentation, a pecha-kucha, etc.) and are prepared to discuss for a lengthy amount of time your research endeavours within that area.
I always try to present my research at a conference before submitting it to a journal. Sometimes you don't get the feedback right there, but later on. Also, different perspectives on the topic of different people usually give me new insights into topic I ma researching. Moreover, I have experiences for more than a few times that I get people interested to do a comparative study of the same topic, so we get another opportunity to collaborate and publish together.