Perhaps Trump was right when he said Mexico will pay for the wall. The world's economic stability is shaky at best and paper/digital assets may soon take a downturn.
On the other hand, cryptocurrencies and precious metals will rise in value during this senario, and likely most rapidly. Mexico, being one of the largest producers of silver would gladly pay for the wall to close down the border. Especially in light of new prospective (pun) foreign opportunists, for their own protection.