I would be really careful with altcoins now. I consider a large part of them being actually still in a bubble. Especially, be careful with coins that were issued with an ICO ("initial coin offering"), including ETH. They often have a centralized development model, and many jurisdictions (like the US and China) do not like ICOs so they could have less demand in the future if these states decide to strictly regulate them, like China appears to be doing now. If investing in ICOs and "ICO coins", look at the good ones, those that have a company with experience behind it.
I think with "LTE" you mean Litecoin, or not? Litecoin is a solid altcoin but has not so much use its market cap could seem to indicate, so be careful here too.
Bitcoin could be still a good deal to buy it now if you are in for the long term, although I consider the current price a bit high (I expect a short term bear market in October/November, where prices could go under $3000 and even briefly may reach below-2000 prices).