Polkadot is a good competitor for ETH. However, currently BNB is in the spotlight to replace ETH if Ethereum 2.0 will not solve the high gas fees which is one of the main reasons why most investors are avoiding ethereum platforms. Some projects have switched to the different platform due to its high fees. ADA, BNB, DOT has a lot of potentials, ETH will soon lose its spot if they don't fix the high gas fees.

My stablecoin that I prefer is Busd. Although usdt is mostly used on majority of exchange and even decentralized market, CZ knows how to keep their asset safe and secure. We all knew the risk of tether that has brought before through security and soemthing like that isnt healthy. I know busd is centralized but I like how it's management handle it well.

You are very lucky, being a presale investor before the bull market. It's not easy to find presale ICOs that have great potential

with 60% market dominance for bitcoin I think it's still stable and it can't be said that BTC is much more trustworthy at this point than altcoins, but if bitcoin dominance is higher than 70% then including that almost all investors believe bitcoin and altseason won't happen in soon.

I think your transaction will simply burn gas and wont ever leave your wallet. I havent seen fee less than 80 gwei in last few months.
Why do you even put so low fee? Check Ethereum Gas checker https://etherscan.io/gastracker next time before you do a transaction.

If you want to withdraw something at a lower cost, then you can use Tron or the TRC20 platform which can support the same token as USDT, because through Tron the costs are very cheap and easy for you to use too.

All the hard forks from bitcoin are often talked about replacing, like in the past, BCH was busy being discussed. even the hype at that time was strong enough to raise the BCH price. Right now I don't think it will happen again. trends such as not repeated in the future. nothing can replace bitcoin. however the altcoin cycle will change every year. like the trend this year defi becomes a profitable investment

Have you secured your private key before? If you are resetting your blockchain means you are downloading a new blockchain and that must be your old data already erased from your wallet. That's why you must sign in to your wallet again use your private key. If you have secured your privatekey and you can open your wallet anytime.
The main problem is have you backup your wallet? if you have not and you have lose your doge.

I believe Elon just happy fun with his tweet, he gets rid of the boredom of his hard work in the company. he wants to know how many react people when he wrote about crypto, this like a result of his company's market for the next strategy. I don't feel so much if he owns those all.

It turns out that many also hate what Elon Musk is doing. indeed not everyone agrees what he did with the Tweet. he easily makes the market go up or down according to his own will. of course this is a mistake. The securities or related institutions should be able to re-examine what Elon Musk was doing. as this could also be indicative of a self-benefit scheme

Past histories and reputations, this can't be denied on IEO projects from top exchanges, I haven't seen a failed project from binance launchpads and every IEO from binance since 2018 are all surging lately, go for top exchanges or look more into polkastarter

I think both Bitcoin and Ethereum are very strong coins with huge potential. And you can't choose, now, which is better. Each project has its own unique perspectives and disadvantages. But BTC and ETH are two cryptocurrency whales that will definitely bring profit to their investors.

Why did you get so depressed during the bear market? wouldn't that also be a good opportunity to buy a large number of popular tokens? because when the market returns to a bull run you will get a lot of profit too.

Defi is giving hard time to bitcoin? I dont think so. Even defi hype happened, btc is not really affected by it.

Many investors join the hype but it didnt last long, and just like the past ICO and IEO it might have the same ending if people are already tired of it due to scam.

If you are not in hurry, you can modify your fee. A week ago i send 20$ worth of Bitcoin only with 0.4$ fee and its not so long, its relatively toleratable.
I set 9 vsat/byte in the setting at that time, reference by : https://www.buybitcoinworldwide.com/fee-calculator/

If you have seen that there is a huge opportunity to gain a very good amount of profit then sell your long term hodl altcoin because we cannot even say when will the market will fall knowing its volatility so always take profit.

Ethereum is good for investment if the high price of a good currency increases the price of etherium has increased a lot compared to the last few years. Ethereum like bitcoin could break its highest record if the market does not crash the amount of token fees has increased many times due to the increase in the price of currencies. The future of Ethereum is going to be much better and even if the price goes down, it may go up again.