with the decline in bitcoin prices a few days ago that impact on some crypto coins better invest with ETH or even wait when the price of crypto coin start to go up and you can trade or sell some coin you have with a pretty good price and it is very profitable.

Buy now as much as you can its 50% off for now lol all altcoins are on sale so the best thing to do is buy more eth or altcoins that you think may give you a decent profit until the end of the year Im sure it will give you 2x0-30x profit buy for now and hodl for months.

You are definitely correct dude!, like what everybody said here Eth is the altcoin which is next into bitcoin in the near future.
And you're choosing the right altcoin actually.

I think this so deep.  I think it's advisable for now to invest ETH cuz for this week ETH has unstoppable it's price goes higher and higher each day. So if you want to invest ETH go for it.

Right now is the best time to invest in our market, Ethereum is a good choice if you want to because it is cheap and it is next to bitcoin. If you have a lot of capital right now you must invest immediately. You might also want to invest in other atls as well. Just make sure that before you invest, you must know what your entering and you must be patient. Do some researching it will surely help you in your future investments.

Bitcoin and Ethereum can be bought at any time because there is great confidence that the price of these coins will show great growth in the future in any case. But if you want to play for a short distance and or have borrowed money, then I would not advise now to make such a purchase. Now the market is very uncertain and there is not one specific trend for its development.

some experts predict the market will fall further, and some more the market will grow in the next few years. so, you can first learn the market pattern and current state.
but according to my own analysis, now is a good time to buy ethereum.

I also see this as a moment to buy and hold!Previously I bought at $518.Need to buy more.

At present, Ethereum is a lot cheaper, so if you are planning to invest a certain amount of money for long-term then Ethereum would be a very good pick. You have to hold it for several years.

I would say yes that this is the best time one can buy Ethereum has the price is still pretty much affordable. All the above listed list of yours is pretty much OK. Don't hesitate do the buying now and hold because you don't know what the price will say tomorrow.