say you wanted to invest in shares of satoshidice. say your expected ROI is something like 50% yearly. if your expected ROI of simply holding bitcoins is 500% yearly, then it would not make economic sense to use bitcoins to purchase shares. it would make a lot more sense to use a currency that is not expected to appreciate in value more than 50%. however, even if bitcoin is expected to appreciate in value by only 45% yearly, it would still make more sense to purchase the shares with another currency, so you can get 50% returns on the shares in addition to the 45% returns on the value you have stored in bitcoins, instead of just the marginal increase of 5% yearly that you'd get from purchasing the shares with bitcoin.
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in other words, you lose out when you purchase shares with bitcoin because you are no longer holding the bitcoins, but only the shares. whereas in the second scenario you are holding both BTC and shares. and this is for an ROI for btc that's LOWER than that of the shares. the very fact that BTC has a non-negligible ROI creates the better economic strategy of using an alternate currency for investments, limiting its use in this respect.
Sure, you are right that it does not make economic sense to invest in Bitcoin companies(using BTC) if you think that the currency will appreciate faster than the company. But people still invest in these companies, could they be out of their minds or just bad investors?
Its easy to forget that not everyone thinks alike. Some possible reasons why people are investing in Bitcoin Companies
1) They invested with the fiat they have (just buy btc for this purpose without touching your existing btc)
2) People don't believe BTC will appreciate faster than Satoshidice or that Satoshidice's growth will match and be parallel to the Bitcoin's adoption growth.
3) People are not sure if BTC will survive a superior crypto-currency or outlawing of the currency by nations. Yet Satoshidice offers dividends, something BTC does not, you could "cash out" every dividend if you were unsure of BTC's future. The truth is that we do not know what will happen 5 years down the road. Its easy to get carried away on the optimism on these forums that Bitcoin $100k is a sure thing that we do not see or refuse to acknowledge possible downside risks.
I have many friends in the IT sector whom ive asked whether they have heard of Bitcoin, i was surprised that most who had heard of it did not think much of it or associated it with virtual play money and brushed it off. I have a friend with very high IQ who thinks Keynesian economics is valid and that inflation induces growth by forcing people to invest instead of hoarding cash. Then again so do Economic Nobel Prize winners. I came to the conclusion that as smart as they are, they lack critical thought to question mainstream thought. They can absorb and understand all the intricacies and theories of Keynes but they lack the conviction to question if it makes sense.
Here in Singapore, ive observed that many of our top students and scholars are what i call Textbook smart. They can absorb anything you throw at them, but they can never think critically or be skeptical of the theories thrown their way because you don't score in exams by arguing with the textbook.
The point im trying to make is that as much the small group of existing Bitcoiner's see the benefits of Bitcoin, there is a very high chance that the rest of the world is not capable of doing so, thus making the $100k Bitcoin a pipe dream. After all these are the same people who voted in the very politicians who brought them their current plight.
in other words, the deflationary spiral i am describing is not a never-ending process that will end in the death of bitcoin, but rather a long phase of its growth that may exhibit a dangerous positive-feedback behavior that will have negative effects on the makeup of the bitcoin economy and commerce and its adoption as a currency.
Again you do not state how it is dangerous/negative.
Back before i heard of Bitcoin, i was less motivated to think of starting a business.
Id have to slog and take risks to earn ever depreciating currency, maybe ill just stick with my day job.
On the contrary(personally), the "deflationary" expectation for Bitcoin motivated me to think of ways to earn Bitcoin which led me to start my exchange. If i think that Bitcoin is going to the moon, would it not make sense for me to accquire/earn as many Bitcoins now? To earn, you have to serve/produce(ie start a business). The motivation to start a bitcoin business is very high for me if i know that any profits are going to grow in value.