Investments for your bitcoin can generally be separated into several categories.
(1) High risk, high return
short-term trading strategy ("buy low, sell high"): But can you read the market well enough to generate the best trading strategy? For every buyer of a coin, there is a seller, so who is doing it wrong?
(2) Moderate risk, moderate return
portfolio investment strategy e.g. Keza (
http://www.getkeza.com) as an investment platform. But you need to invest time in selecting the right investment portfolios based on the composition, underlying beta and future outlook.
(3) Low risk, low return
secured lending strategy (collateralised lending). But need to vet borrowers based on past track record too.
Avoid HYIP, Ponzi schemes, and fanciful, unrealistic promises.
http://themerkle.com/bitcoin-investment-startup-keza-unveils-ios-beta-app/https://www.producthunt.com/tech/kezahttp://getkeza.com/ (It's free to apply for a Keza account)
So basically you are saying that critical thought needs to be applied to any investment strategy? Your reasoning is absolutely sound but not really the point. The key, I think, is not looking for one good place to invest your bitcoin but looking at your criteria for investment. For instance, I need liquidity or I cannot tolerate losing principal. Then look to split your holdings over a variety of portals, also taking into account counterparty risk!
Getkeza might be a part of that strategy. Taking a position in gold futures, or Google, or Betfair or S&P Futures or Tesla on
www.firstglobalcredit.com website might also be a sound addition to the portfolio. FGC also gives you the ability to move the bitcoin securing the trades in and out of fiat at the same time giving 2 bites of the 'profit apple'. That could also be a useful part of the strategy as well? As might bitbond or BTCJam, especially while the bitcoin price is trading in a range therefore limiting the problem of having repayments being greatly out of kilter with the initial debt profile. I think liquidity is a key issue for many investors and having access to over 250 mainstream markets like the firstglobalcredit platform provides might be very helpful.
Getkeza is a cool concept however.