In trading their is a word scalping. Buy low sell high, how can you say it is safe and profitable?
That is not the meaning of 'Scalping' dude,
Finding the opportunity to get many profit on small price changes,even thought the purpose between your meaning and the definition are same but many people used this words to explain someting wrongly.We used the opportunity to get a 'Profit' from small change that called 'SCALPING'.
If you buy a coin today and tomorrow it's doubling from your initial price that's not 'SCALPING'.
Of course,if you want to play it you need to do some research in the time frame and drawing the chart:
usually,people using 5,10,30 minutes as their time frame,other than that you should understand and know about Market Sentiment and News before doing this,who knows what will happen in the next 5 minutes ?