invest in what? altcoins? no never. at least not as long as there isn't any altcoin worth investing in. until they start creating projects that are innovative enough to have some sort of long term potential, i don't see anything changing for altcoins being pump and dumps.

in bitcoin? of course! bitcoin has long term potential as its adoption is growing and more importantly since the adoption that has happened so far is still so tiny (less than 1%) and it is actually used in the real world not just traded on exchanges!