USA will export Propane gas to countries like India and China. US will be the Saudi Arabia of Gas soon. PDH is in the right place for huge future profits. My fear is that PDH will be bought out by a Big Company.
"PDH will double or triple on two years because USA will export Propane gas to countries like India and China."
This makes no sense. PDH converts propane into propylene, thus is uses propane as a feedstock and benefits from propane being cheap. Exports or anything else that tends to increase the price of propane would lower PDH's profit margin.
"My fear is that PDH will be bought out by a Big Company."
You also forgot to consider that many of those "Big companies" are planning on building their own propane to propylene facilities. It will be a few years but PDH will face some big competition in a few years.
Yes, Ethane is much cheaper but in India and China, billions of people live in remote areas that require Propane for cooking and heating. Thus, huge amount of Propane will be exported if our government allows it.