Usually when Bitcoin dominance increases this means that altcoins are very cheap and this corresponds mostly with bearish trends.

When btc dominance lowers, altcoins become more expensive (bull run), btc price increases also, but not with the same speed.

There are many alts with great potential to raise when bull run will come.

If you look for a mature altcoin,  I would recommend you Ethereum. It continues to develop progressively and most of ICOs are still based on Eth platform.  If you want to try something new, then you might want to have a look to MYO, the tokens of Mycro Jobs project, which is just great. (Details in my signature)

If anyone knew the answer to this question he/she would be already rich, and most probably not sitting on a forum to answer questions 😊

So don't expect someone to know this answer. However, as next year is Btc halving and comparing to what happened during/after last halvings, it is possible to see a strong bull run  by 2020.

I don't know what exactly you understand by cryptocurrency banks, as crypto appeared as an alternative to ordinary banks.

If you see banks just as a safe store of crypto, then you should know that they use hardware wallets, too. So if "banks" use cold storage,  everyone can do it, we don't need banks to store our funds.

If you want to exchange Bitcoin for cash, the easiest way is to use Localbitcoin.

If your Btc already dropped and you don't want to lose money, then don't sell yet. Hold you btc until price will recover. You only lose when you sell.

I would bet on Ethereum, as I find it more useful in real life than Bitcoin Cash.

Most of ICOs are still based on Erc20 platforms and this should consolidate the ETH's price on short-middle term at least. Btc Cash I see it more for speculation purposes.

Your question is way to general to receive a specific answer. Which altcoins are you referring to? All altcoins?

There are completely useless altcoins as there are very good alts, with real utility (see ETH), as well.

Globally the number of Bitcoin ATMs has increased very much. Even in my country I saw last month 2 new machines. These are good news as they are a sign that demand is on an ascendant path and this should translate soon into a price increase.

Bitcoin transactions cannot be cancelled. The process is irreversible and this is how the network has been built.

Personally,  I find that as a good thing, as I wouldn't want to see that a transaction I had in my wallet during the night has been cancelled in the morning.

Crypto is not a regulated market, meaning that nobody is responsible to make it less volatile. This is why some huge whales become very rich, as they could manipulate the market as per their own wish.

To have a less volatile we need 2 main things to happen: regulation and increasing adoption rate.

It's good to make mistakes if you learn something from them and avoid to do the same mistake next time.

However, sometimes is just better to learn from others mistakes.

The main concern in crypto should be security. All others (adoptio  rate, regulations etc) are less important as if you lost all your funds it doesn't matter that much if they were regulated or not 😊

Investing in a hardware wallet is the best option to keep your crypto safe.

Bitcoin is not a method to get rich overnight. The first time it hit 20k was more a speculation than the real value of btc at that time.

When adoption rate will increase and Network Lightning will go live, we have all chances to see Bitcoin at new ATH values.

Only naive people think crypto price can be predicted. How could price be predicted on longterm is price has huge fluctuations from a month to another?

To be more predictable crypto will need some regulations.  Till then price will be just a rollercoaster with high and lows very hard to anticipate.

Btc is already manipulated by big whales.

If btc will be present on Wall Street one day, then manipulation will be there at another level. Huge whales will be anywhere, so price will not be "free of manipulation" no matter what.

As an investor there is nothing to do in order for the price not to dump after listing.

Usually,  when hitting an exchange, bounty hunters of weak projects will sell thir tokens for a quick profit.
However,  this will never happen for strong projects and the price is raising significantly when they hit good exchanges.

After all what happened in 2018 with ICO-BASED projects people are more reticent about investing in ICOs.

However,  good projects will be successful anyway and will be able to reach the hardcap through ICOs in 2019, too.

Eth is the king of altcoins. Why would you want to sell it when the price is low?

POS is about to be implemented for Eth and this might increase its price as you will be rewarded for owning and holding your Eth.

If you don't want to invest money in btc, then you need to invest your time.

You can participate in different bounty programs and as soon as you get the tokens for your work you can exchange them into btc.

Anything is possible in crypto due to its volatility,  but this will most probably not happen.

In order for Monero to reach 500$, glabal capital should increase ~ 10 times. This means a lot of new money should be thrown on the market. All signs indicate rather the opposite.