How much truth does this statement carry? I see it quoted in this forum with references to economic texts. It makes me think about the function of traders in the greater economy. They will be driving a majority of the liquidity in the markets, taking that into account, would it be considered healthy growth?
When thinking into more depth, an online shop, say for example bitcoinstore (which I'm a big fan of) might trade $1mill in two months. This would involve a lot of people within the economy spending their coins in exchange for products. The benefits are easily seen and the growth in the economy easily visible.
On the other hand, a single trader with $5k in a margin account could rack up $1mill of traded volume within two weeks.
The original statement seems to suggest that the trader would benefit the economy more than the online shop.
From an economics perspective, what is healthy growth?
"One of the key drivers to healthy growth in an economy is liquidity."
Liquidity is absolutely necessary to have healthy growth. But there is only a certain amount of liquidity that the market needs and when a market becomes too crowded some participants get washed out. It is usually the participants with the most exposure, i.e. the guy with 1 million in trade volume in two weeks.