Most likely Dallol will never turn into mass tourist site - it is too hot and too remote
And this is good - because the salt formations are fragile. Visit to the site is not too safe either - you are never sure whether you are not walking over a thin layer of fragile salt with hot acid under it. And remember the terrible maars - every second there can happen grand explosion. This sounds menacing - but this ephemeral feel also is a part of the charm of Dallol.