honestly day trade is so random in term of profitability, nobody can guarantee whether you gonna lose your money or make profit, it is at the end of the day comes down to statistic and as of now 90% of trader are losing money, doesn't mean all losing money, if you got the edge you might become the remaining 10% who is profitable.

basically it depends on you and your trading ability, like any other activity, even arbitrage has chance of losing, doesn't mean everybody is losing though.