I would not invest long-term in BTC right now unfortunately because there is an obscure risk of BTC obtained after August being stolen in a long-range chain reorganization funded by SegWit “pay to anyone” booty:
https://bitcointalksearch.org/topic/will-bch-kill-btcsegwit-while-reinstating-btcsatoshi-2259054https://bitcointalksearch.org/topic/crypto-winter-is-coming-again-2268216Also as others have suggested, mining is a very difficult game to win, because it’s locked up by the big boys who get first access to the newest most efficient ASICs, the free electricity in China, etc..
Also others are correct that we are closer to some sort of topping and crash in the crypto markets than we were earlier this year. No one knows exactly when or if the next crypto winter is coming, but our sector is overheated and already in a bubble. Yet it could go higher still (and probably will especially at least for altcoins which are currently lagging behind BTC and should probably catch up).
Also do not listen to anyone trying to tell you which of their shitcoins to invest in. Everybody wants you to invest in the same bags as them.
My suggestion is play it safe and only invest in proof-of-work altcoins and avoid all ICO issued altcoins like the plague. Both because another shoe could drop at any time w.r.t. to securities law enforcements and because there are 1200 ICOs and they are all way over hyped shitcoins (at least 90% of them will go to zero):
https://bitcointalksearch.org/topic/m.24087072So basically buy XMR, LTC, etc...
However, I caution you that when you have a double or triple in these, then take profits and wait for safe time to re-enter Bitcoin after the SegWit crap has been removed from Bitcoin or there is some clarity on the ”pay to anyone” booty problem of SegWit.
Btw, I am a Legendary been around since 2013 when BTC was $10. But do not listen to me (this is a new account of mine). Make your own decisions.
As others stated here, we’re concerned you’re coming in a bit late and we do not want you to lose money. So do not be greedy. You are probably not late on altcoins, but remember to take profits as we are getting nearer to some bubble top and crash sector wide. Far too many ICOs and hype that can not be sustained by more fools like yourself coming in to buy too late. Not enough of you fools to buy 1200 ICOs.
Remember the reason you are here, is because we are in a bubble and you want to jump into the bubble. The greater fools always buy the top and sell the bottom.