We are all told the general rule to invest what we can afford to lose, but in reality no one likes loosing any amount of capital. Of course we should never go all in, but there is no fixed range around 'what we can afford to lose',  I consider it to be, amounts that won't change our diaky pattern, or standard of living.

Investors should not be concerned about daily, intermittent price fluctuations and the accompanied price speculation.
Bit day traders can not escape the pressure of the market volatility, best to find a way to separate emotions when trading