Bitcoin is too high. But it's not that you can't make a profit from bitcoin. It depends on how much money you want to invest. If it's big, there's no harm in storing most of it in bitcoin. Because it will still be profitable. And 50% of it you can invest into altcoins that you believe in the future can produce greater profits.
Its never too high, if its too high then no point to invest on entire cryptocurrency since it would be decline anytime soon. Just invest it after some dips come, so u can start accumulate it safer.