Overall, I totally agree with what you said, Bitcoin Cash is one of the best coins and a lot of traders have high hopes for BCH. As one of the best altcoins on the market, I always check the movement of the BCH chart, because besides ETH, I also keep BCH in my wallet. If the predictions made by several experts do come true, so my waiting has not been in vain.

As before explained, crypto has a great future, as real evidence, most countries have started to legalize crypto, although fiat currency is still an official transaction instrument recognized by the state, but cryptocurrency already dominates in several countries. If cryptocurrency is adopted en mass, It is very likely that in the future cryptocurrencies will be parallel to fiat currencies.

What is the reason you are selling the Ethereum that you have held for a long time? 
If you need money for personal use or buy something very important, there is no more reason to hold the assets that you have held, Moreover, you have received 20% profit from the investment that you have done so far. But if you want to buy another coin to accumulate profit in a short time, you should consider your intention to sell ETH, because as you said above, ETH is one of the best coins, so something good always gives the best results.

You can buy as many defi coins as you want, Moreover, defi is now a trending topic in this forum, Very many investors have bought defi coins and kept them in their wallets. But you should not be too passionate when investing, you must know when to buy and when to resell, because if you are wrong when making a decision, then the risk is you will lose the money that you have invested. 
My advice, make quality investments, do not by quantity.

After doing very mature research, then we make decisions based on the type of project according to their respective tastes. Currently the defi project is dominating the market, very many investors who took part in it. For me personally, prefer to use a long-term investment strategy in the top coins, such as ETH, LTC, BNB etc. Even though the profit I got was not too much, the risk of loss I faced was very small.

Scammers have always been parasites in the crypto space, throughout the history of crypto projects have never been free from scammers, starting from ICO, IEO and DEFI. Their presence is very disturbing, thus making investors suffer huge losses. Investing in crypto projects is very risky, but we can avoid it by researching and understanding the direction and goals of the projects we are going to invest in.

The risk that is often faced by Bitcoin users is a lack of understanding of the nature and workings of cryptocurrency, They don't know when to buy, sell, and so on. Before investing, you must know the ins and outs of investing so you don't experience losses. The fluctuating price of BitCoin allows us to make a profit. Therefore, we can get a significant profit if we carefully observe the trend of price changes.

Crypto market conditions are very difficult to predict, price fluctuations have become commonplace, We cannot prevent mass sales when buying at a high price. We can only wait for the right moment to make a purchase, to avoid the risk of loss, you should do the analysis and start moving when the chart starts to rise. The crypto market always gives new colors, so it's never too late to buy crypto.

Finally what was feared all this time also happened, scammers will do everything they can to get money in the wrong way and harm others, In cases like this, investors are always victims. Incidents like this are very harmful to the good name of Defi, even though Defi is on the right track, but because of the scammer, Investors will think twice about investing in Defi.

Getting coins that are dead or have no selling value in the market is a risk for bounty hunters, because most new projects always end in disappointment. I have felt the same disappointment, every coin I get from the project always ends in disappointment, and I was forced to throw it away., because there is nothing I can expect from the coins that have been left by the development team.

A successful project is the result of the hard work of the development team, when it was first launched, all projects have the same opportunities, the performance of the development team is very influential in the success of a project, if the project has a good direction, investors will wait patiently, but if the project is bad, investors will soon leave the project.
coins like dashboard, litecoin, Xmr, Bitcoin etc can reach the pinnacle of success because they have a great team, they are very persistent and can convince investors that the project they develop will lead to success.

All have a time, Ico and Ieo are gone, Now Defi is making a splash in the crypto space and its charm will continue. As long as the defi charm is still warm, senior investors will take advantage of this opportunity to get money in it, because they know that sooner or later the defi trend will end as Ico and Ieo have experienced in the past.

Having a lot of money is certainly everyone's dream, but to get it requires skill and a long time. Cryptocurrency as a medium for making money, but not as easy as people imagine. We need effort and knowledge before deciding to join cryptocurrency, so we don't get caught up in a loss hole.

Someone have accessed your wallet very easily, The private key is the only access to make transactions in the wallet, you can say never give the private key to other people, and in fact you get transaction notifications that you never did. You should leave your old wallet and immediately move valuable shitcoin into a new wallet, because the old wallet is no longer safe to use.

In a short time defi has become the main trending in this forum, but the pros and cons still happen, some say the hype defi is only temporary, and on the other hand there are those who have made profits in some defi projects. At the moment we don't know how long the defi hype will last, but defi has brought fresh air and aroused excitement in the crypto market, only lucky people can take advantage of it.

Experienced investors will not be easily tempted by the hype defi, they always consider and do research before making a decision, because they know carelessness will cost them everything.
Defi has already spawned several new projects into the crypto space, but believe me, of many defi projects created, not everything ends badly, there will be good potential projects that will make the crypto market grow.

Too bad, you missed the heyday of the ICO, 2013 to 2017 is the most profitable period to invest in ICO, After that the popularity of ICOs began to decline. Then the IEO came with a new hope, but it is very difficult to find a good project. And now Defi comes with a huge HYPE, very many investors fall in love with the sensation of defi and take part in it, You must consider and do research before investing in Defi, because so many greedy people use the sensation of defi to profit.

Yeah, I agree with you, market conditions can change at any time, we must be wise when making decisions, market conditions must be adjusted to the shitcoin we hold, if the coin in the portfolio is showing signs of not doing well, we need to sell it as fast as possible, instead we are looking for high-end coins to add collections to the portfolio.

Everything has its time, from ICO, IEO and then DEFI came to bring new hope in crypto. The Defi hype was having the upper hand and very many were taking part in it. But what is most frightening is that Hype Defi is used by greedy people, they make fake defi projects to get money from people who fall into their trap, we must be careful when making decisions so as not to get caught in the red hole made by greedy people, because they never stop before they get what they want.

Conditions like this have often happened in cryptocurrency, rise and fall in price is unavoidable, which is why can no one predict the movement of the crypto market. The presence of defi in the crypto space does not have a bad impact on bitcoin and Eth, on the contrary, with the presence of defi, more and more new investors will join cryptocurrency, and the competition will be even tighter.