I think the price will be around $25 US per ONION.
Do you have clear bases as to why you claim that by March 2018 the price of onion will be at $25 each? The number of onions at that time will for sure be big already. And a very big dump will for sure happen since the biggest part of onion holders will probably dump their onion earnings from the several months airdrop. That must be so many onions accumulated per airdrop participant already.
$25 Is just an estimation based on how fast DeepOnion is growing, 2 months ago where we were only 500 members, and after social media campaign, we are now 3100+ members. Other factor is the DeVault feature, plus other features that will be developed. DeepOnion has a strong community, enthusiasts another factor!