Other options include partnering with someone with better credit, negotiating seller financing, or leveraging existing property as collateral.

I am still amazed at all the investors who went from their interest stopping to ( I lost all my money) with out digging into the collateral.

Have them use as collateral and get a point off the interest rate.  4.  

I understand I lose my collateral upon sale of the property.

Even then it is likely due to an underestimation of the value of the underlying collateral or total payoff miscalculation if the loan is in BK. 

Something else to consider is that once these properties are paid off, you could cross collateralize to purchase additional properties that fit your buy box so that you may not need to bring cash to the table for a down payment.

If I put up 1 BTC ($10,000) as collateral, I can use a multitude of platforms to get a 30-70% LTV of cash in my bank.

Financing options include cross-collateralization, cash-out refinance, and DSCR loans.Good luck!

We will be investing through a US corporation and all partners (and there are many) are foreign nationals so we cannot give any personal guarantee or collateral.

What you would do is have an agreement in place with a lender for a bridge loan and have your current home as a cross collateralization.