Yes in the general opinion, gambling shouldn't be taken or seen as an investment
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Not in general but in any opinion gambling should never be considered as an investment because the ones who gamble often get so involved in it that they forget about the risk of losses. Many gamblers lose thousands of dollars per day while investors can't risk to lose that much.
Either ways you both presented it, gambling is not an investment, the only way we can consider it an investment is on those who have invested to start a gambling business as their own establishment which I believe could have involved alot of money as well, but for any gambler who thinks he could also finds a means of living through gambling may be totally wrong about it.
Gambling could really be just that an investment on the time that you would really be that making yourself to be the house and this is the only possibility that you could really be having advantage or making money through gambling on which you are really that the owner but if you are the gambler? Dont expect much and it would really be that best that you should really be that
making yourself wary about the reality and dont make yourself that delusional because if you do then this is where things turns out to be that messy on which you would be making those
bad decisions and actions on which it musnt really that supposed to be done in the first place. Make yourself that responsible and mindful about on the
actions made specially on dealing with gambling.