I would not say 100 percent. Make informed decisions, and most of all don't go all in to one coin. And keep some in BTC and well known Scrypt coins. There is great profit to be had on alt coins but don't just throw money at it and assume instant profit. And do it slow learn and don't just jump in with all your coins at once.
People who rush into day trading are usually the impatient type. Most will not survive the first year while the learning curve is well longer than a year.
When being patient and doing a lot of research before buying, and keeping your emotions out of your trading, it really isn't that hard.
If you never sell below the price you bought at, and keep your eyes open to sell on pumps, profits are to be expected. That is if you are modest and consider 10% profits as good; many seem relunctant to sell under 100%.