Update opportunity-for-gain.md

#193 [s]: fixed typo

claims/opportunity-for-gain.md

@@ -53,7 +53,7 @@ Since crypto assets are [investments](../concepts/security.md) the purpose of bu
 
 This is comparable to the analogy of a game of poker and other [gambling](../concepts/gambling.md) games The only money that can be won in a poker game "pot" provided by the players of the card game. The act of playing poker does not generate any money, it simply redistributes to participants according to a game of chance. If the "house" or casino takes a percentage of the pot on every round of the game played then the size of the pot must decrease over time. This turns the zero-sum game into a negative-sum game which admits a negative [expected return](../concepts/expected-return.md).  
 
-Investing in crypto assets is statistically guaranteed to lose money for almost all market participants because as investments they have no [income-cashflows](../concepts/income-cashflows.md). This differs drastically from [productive assets](../concepts/productive-asset.md) such as [stocks](../concepts/stock.md) ,[bonds](../concepts/bond.md) and [real-estate](../concepts/real-estate.md).
+Investing in crypto assets is statistically guaranteed to lose money for almost all market participants because as investments they have no [income-cashflows](../concepts/income-cashflows.md). This differs drastically from [productive assets](../concepts/productive-asset.md) such as [stocks](../concepts/stock.md), [bonds](../concepts/bond.md) and [real-estate](../concepts/real-estate.md).
 
 While there is evidence of some people making gains trading crypto, there is a strong sample bias in self-reported winnings of crypto assets: participants who make outsized returns gambling on the bubble are more likely to report these returns compared to the vast majority of those who lose money investing in crypto assets.
 
@@ -108,4 +108,4 @@ HQ, I. (2019) The case for a small allocation to Bitcoin, Kana and Katana. Avail
 Huang, M. (2020) Bitcoin for the Open-Minded Skeptic, Matt Huang. Available at: https://www.matthuang.com/posts/bitcoin_for_the_open_minded_skeptic (Accessed: 14 September 2022).
 
 Lefevre, E. (2004) Reminiscences of a stock operator. John Wiley & Sons.
-Malkiel, B.G. (1999) A random walk down Wall Street: including a life-cycle guide to personal investing. WW Norton & Company.
+Malkiel, B.G. (1999) A random walk down Wall Street: including a life-cycle guide to personal investing. WW Norton & Company.