When it comes to altcoins bull run,, you can always go with the flow but apply cautious unless you're investing for long term that's when you don't have to care about the pumps and dump as coins are likely going to dump ones the energy die off.
The time has come for being more careful with our buy. The bull is kicking up and I see some altcoins in green including the shits projects. The pump is on and the dump too can start anytime and like you rightly said, a short time investor looking for ROI in a shortest time may be built with a wrong investment. Investing in top altcoins can be better for shorting while unknown projects can go for longtime.