You can lose money as fast as you want with any strategy

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Scalping can be used as a main strategy or be used as a sub strategy. For example, my main strategy involves picking a stock long early on where I think it will end higher near mid or late in the day. I may do a few scalps while I wait for that to happen.
I wont talk about risk in terms of scalping but I will say that manual traders typically don't have an edge in scalping as it is dominated by algo traders and institutions who have better pricing and data supporting their entries & exits.
I'll also lean towards that scalping shouldn't be one of the first trading strategies one should learn and the strategy should only be used by those who have successful experience in other trading strategies.
Also, I just noticed NOW that this is under the forex sub forum... I'm fairly certain trading large swings is much more profitable than scalping forex lol.