In a bear market Pirate's strategy makes a lot of sense. It just does not work very well in a bull market.
And why do you assume this is Pirate's strategy. Do you really think he's that stupid? I've discussed his risk profile with him and he's not as dumb as you assume. Again, I'll ask: Where is one scrap of evidence that your claims have anything to do with reality?
We already know his strategy works very well in a
bear market. The proof in that he has not missed a payment. Let us see how he does in a bull market particularly one where the BTC / USD price rises
sharply.
This is too generalized a statement.
Rising 'sharply' isn't necessarily the issue -- it's
when it rises sharply, and
if that rise holds.
Keep in mind that unless he's retarded (and improbably lucky), he will never have 100% USD or BTC. But, suppose that he is holding mostly BTC -- this BTC is what is needed to be sold and drive the price down so he can repurchase BTC for interest payments.
If the price rises sharply while he is holding BTC, this is a non-issue. In fact, it rocks for him. He will simply sell at a higher price and profit like crazy.
If, however, the prices rises sharply AFTER he cashes out his BTC, then this becomes a problem. Pirate now needs to go to a secondary approach -- sparking a rally with hes newly acquired USD so that he will once again have an opportunity to sell higher than his purchase price.
So, Pirate will try to spark a rally in the same manner that he has before. Typically, when Pirate sparks a rally, he initiates a sell-wall in order to invite more traders to create their own sell bids. This sell-wall has 2 advantages -- 1) It helps accumulate more sell orders around his sell-wall, or 2) it may encourage other traders to drop the price for him.
Knowing this, there is a main, general way to fuck with Pirate, but it requires an insane amount of capital. You will need an amount of capital equal to Pirate's capital. But, the community at large has such capital.
Buy. Buy like fucking mad. This needs to begin after a crash. You need to buy and keep buying. You need to buy all of his sell walls and drive the price up.
BUT, you cannot fill in new orders in the order book. There needs to be a permanent margin between the price at which this post-crash rally begins and the new price. If this margin persists for 1 week, Pirate will eventually default on his interest payments.
For example, lets say the price is at $9 when Pirate crashes it to $8. This is when you need to buy. Buy buy buy up to $9, $10, $11, etc. But, there needs to be a near empty order book on the buy side between $8 and the new price or else Pirate will be able to generate a profit still. After all, Pirate will, of course, be among the first to buy once he sees a rally is occurring, so he will convert back to BTC. But, if there are so few orders in the order book, he will not be able to profit. The final icing on the cake would be an absolutely massive bid wall at $8, a wall so large that Pirate would lose all BTC holdings if he were to attempt to try to crash the market below $8 to spark a new crash and buy at even lower prices.
In other words. Wherever the next crash stops, that needs to be where an insurmountable bid wall forms. After that bid wall forms, go all in and Pirate will default.
The problem with this, of course, is that unless only a few people could pull off this massive bidwall stunt, it could never be coordinated with so many people involved, and some people would end up losing a whoooole lot of money.