I think bitcoin and ethereum altcoin are good for us now, because now the development of both is also better, so I'm sure the future of bitcoin and ethereum is also a good way for us to last.
Bitcoin is always good as ever. Ethereum is another choice that you can also depend with for this year, its too pretty low so you can get it while you can at the cheapest price.
Bitcoin would be the top priority if someone is looking for the 'hottest' coin to invest for this year. And every year, you must get and accumulate it while there's ample time left for us.